diff --git a/src/pocketmine/block/Anvil.php b/src/pocketmine/block/Anvil.php
index 4c3114bd4..73c2e6c0f 100644
--- a/src/pocketmine/block/Anvil.php
+++ b/src/pocketmine/block/Anvil.php
@@ -71,7 +71,7 @@ class Anvil extends Fallable{
 	}
 
 	public function getDrops(Item $item){
-		if($item->isPickaxe() >= 1){
+		if($item->isPickaxe() >= Tool::TIER_WOODEN){
 			return [
 				[$this->id, 0, 1], //TODO break level
 			];
diff --git a/src/pocketmine/block/Bricks.php b/src/pocketmine/block/Bricks.php
index ef73423b9..d639cc042 100644
--- a/src/pocketmine/block/Bricks.php
+++ b/src/pocketmine/block/Bricks.php
@@ -49,7 +49,7 @@ class Bricks extends Solid{
 	}
 
 	public function getDrops(Item $item){
-		if($item->isPickaxe() >= 1){
+		if($item->isPickaxe() >= Tool::TIER_WOODEN){
 			return [
 				[Item::BRICKS_BLOCK, 0, 1],
 			];
diff --git a/src/pocketmine/block/BurningFurnace.php b/src/pocketmine/block/BurningFurnace.php
index 18d028e73..ed12a40b6 100644
--- a/src/pocketmine/block/BurningFurnace.php
+++ b/src/pocketmine/block/BurningFurnace.php
@@ -135,7 +135,7 @@ class BurningFurnace extends Solid{
 
 	public function getDrops(Item $item){
 		$drops = [];
-		if($item->isPickaxe() >= 1){
+		if($item->isPickaxe() >= Tool::TIER_WOODEN){
 			$drops[] = [Item::FURNACE, 0, 1];
 		}
 
diff --git a/src/pocketmine/block/Coal.php b/src/pocketmine/block/Coal.php
index 75e4fb0d4..494534dcf 100644
--- a/src/pocketmine/block/Coal.php
+++ b/src/pocketmine/block/Coal.php
@@ -45,7 +45,7 @@ class Coal extends Solid{
 	}
 
 	public function getDrops(Item $item){
-		if($item->isPickaxe() >= 1){
+		if($item->isPickaxe() >= Tool::TIER_WOODEN){
 			return [
 				[Item::COAL_BLOCK, 0, 1],
 			];
diff --git a/src/pocketmine/block/CoalOre.php b/src/pocketmine/block/CoalOre.php
index 964ed7647..6c1a78e76 100644
--- a/src/pocketmine/block/CoalOre.php
+++ b/src/pocketmine/block/CoalOre.php
@@ -45,7 +45,7 @@ class CoalOre extends Solid{
 	}
 
 	public function getDrops(Item $item){
-		if($item->isPickaxe() >= 1){
+		if($item->isPickaxe() >= Tool::TIER_WOODEN){
 			return [
 				[Item::COAL, 0, 1],
 			];
diff --git a/src/pocketmine/block/Cobblestone.php b/src/pocketmine/block/Cobblestone.php
index 0a41aa186..5954edbba 100644
--- a/src/pocketmine/block/Cobblestone.php
+++ b/src/pocketmine/block/Cobblestone.php
@@ -45,7 +45,7 @@ class Cobblestone extends Solid{
 	}
 
 	public function getDrops(Item $item){
-		if($item->isPickaxe() >= 1){
+		if($item->isPickaxe() >= Tool::TIER_WOODEN){
 			return [
 				[Item::COBBLESTONE, 0, 1],
 			];
diff --git a/src/pocketmine/block/Diamond.php b/src/pocketmine/block/Diamond.php
index cbe924c95..1fd175dca 100644
--- a/src/pocketmine/block/Diamond.php
+++ b/src/pocketmine/block/Diamond.php
@@ -45,7 +45,7 @@ class Diamond extends Solid{
 	}
 
 	public function getDrops(Item $item){
-		if($item->isPickaxe() >= 4){
+		if($item->isPickaxe() >= Tool::TIER_IRON){
 			return [
 				[Item::DIAMOND_BLOCK, 0, 1],
 			];
diff --git a/src/pocketmine/block/DiamondOre.php b/src/pocketmine/block/DiamondOre.php
index e9b9466db..c05abb384 100644
--- a/src/pocketmine/block/DiamondOre.php
+++ b/src/pocketmine/block/DiamondOre.php
@@ -45,7 +45,7 @@ class DiamondOre extends Solid{
 	}
 
 	public function getDrops(Item $item){
-		if($item->isPickaxe() >= 4){
+		if($item->isPickaxe() >= Tool::TIER_IRON){
 			return [
 				[Item::DIAMOND, 0, 1],
 			];
diff --git a/src/pocketmine/block/DoubleSlab.php b/src/pocketmine/block/DoubleSlab.php
index cf037e961..3ccdcf84b 100644
--- a/src/pocketmine/block/DoubleSlab.php
+++ b/src/pocketmine/block/DoubleSlab.php
@@ -55,7 +55,7 @@ class DoubleSlab extends Solid{
 	}
 
 	public function getDrops(Item $item){
-		if($item->isPickaxe() >= 1){
+		if($item->isPickaxe() >= Tool::TIER_WOODEN){
 			return [
 				[Item::SLAB, $this->meta & 0x07, 2],
 			];
diff --git a/src/pocketmine/block/Emerald.php b/src/pocketmine/block/Emerald.php
index b5db557e0..2f24e34c5 100644
--- a/src/pocketmine/block/Emerald.php
+++ b/src/pocketmine/block/Emerald.php
@@ -45,7 +45,7 @@ class Emerald extends Solid{
 	}
 
 	public function getDrops(Item $item){
-		if($item->isPickaxe() >= 4){
+		if($item->isPickaxe() >= Tool::TIER_IRON){
 			return [
 				[Item::EMERALD_BLOCK, 0, 1],
 			];
diff --git a/src/pocketmine/block/EmeraldOre.php b/src/pocketmine/block/EmeraldOre.php
index 54971f3b4..90fac45c3 100644
--- a/src/pocketmine/block/EmeraldOre.php
+++ b/src/pocketmine/block/EmeraldOre.php
@@ -45,7 +45,7 @@ class EmeraldOre extends Solid{
 	}
 
 	public function getDrops(Item $item){
-		if($item->isPickaxe() >= 4){
+		if($item->isPickaxe() >= Tool::TIER_IRON){
 			return [
 				[Item::EMERALD, 0, 1],
 			];
diff --git a/src/pocketmine/block/EnchantingTable.php b/src/pocketmine/block/EnchantingTable.php
index f65c5f8bc..5890367ab 100644
--- a/src/pocketmine/block/EnchantingTable.php
+++ b/src/pocketmine/block/EnchantingTable.php
@@ -97,7 +97,7 @@ class EnchantingTable extends Transparent{
 	}
 
 	public function getDrops(Item $item){
-		if($item->isPickaxe() >= 1){
+		if($item->isPickaxe() >= Tool::TIER_WOODEN){
 			return [
 				[$this->id, 0, 1],
 			];
diff --git a/src/pocketmine/block/GlowingRedstoneOre.php b/src/pocketmine/block/GlowingRedstoneOre.php
index a1675fc02..095241607 100644
--- a/src/pocketmine/block/GlowingRedstoneOre.php
+++ b/src/pocketmine/block/GlowingRedstoneOre.php
@@ -60,7 +60,7 @@ class GlowingRedstoneOre extends Solid{
 	}
 
 	public function getDrops(Item $item){
-		if($item->isPickaxe() >= 4){
+		if($item->isPickaxe() >= Tool::TIER_IRON){
 			return [
 				[Item::REDSTONE_DUST, 0, mt_rand(4, 5)],
 			];
diff --git a/src/pocketmine/block/Gold.php b/src/pocketmine/block/Gold.php
index cb9421124..62b942f53 100644
--- a/src/pocketmine/block/Gold.php
+++ b/src/pocketmine/block/Gold.php
@@ -45,7 +45,7 @@ class Gold extends Solid{
 	}
 
 	public function getDrops(Item $item){
-		if($item->isPickaxe() >= 4){
+		if($item->isPickaxe() >= Tool::TIER_IRON){
 			return [
 				[Item::GOLD_BLOCK, 0, 1],
 			];
diff --git a/src/pocketmine/block/GoldOre.php b/src/pocketmine/block/GoldOre.php
index 5c87c16d4..c56cff977 100644
--- a/src/pocketmine/block/GoldOre.php
+++ b/src/pocketmine/block/GoldOre.php
@@ -45,7 +45,7 @@ class GoldOre extends Solid{
 	}
 
 	public function getDrops(Item $item){
-		if($item->isPickaxe() >= 4){
+		if($item->isPickaxe() >= Tool::TIER_IRON){
 			return [
 				[Item::GOLD_ORE, 0, 1],
 			];
diff --git a/src/pocketmine/block/Iron.php b/src/pocketmine/block/Iron.php
index 66a2c28ee..2ffc4cd6a 100644
--- a/src/pocketmine/block/Iron.php
+++ b/src/pocketmine/block/Iron.php
@@ -45,7 +45,7 @@ class Iron extends Solid{
 	}
 
 	public function getDrops(Item $item){
-		if($item->isPickaxe() >= 3){
+		if($item->isPickaxe() >= Tool::TIER_STONE){
 			return [
 				[Item::IRON_BLOCK, 0, 1],
 			];
diff --git a/src/pocketmine/block/IronBars.php b/src/pocketmine/block/IronBars.php
index bebe0f3a2..b5e70e873 100644
--- a/src/pocketmine/block/IronBars.php
+++ b/src/pocketmine/block/IronBars.php
@@ -45,7 +45,7 @@ class IronBars extends Thin{
 	}
 
 	public function getDrops(Item $item){
-		if($item->isPickaxe() >= 1){
+		if($item->isPickaxe() >= Tool::TIER_WOODEN){
 			return [
 				[Item::IRON_BARS, 0, 1],
 			];
diff --git a/src/pocketmine/block/IronDoor.php b/src/pocketmine/block/IronDoor.php
index 447b723f9..70195b9a9 100644
--- a/src/pocketmine/block/IronDoor.php
+++ b/src/pocketmine/block/IronDoor.php
@@ -45,7 +45,7 @@ class IronDoor extends Door{
 	}
 
 	public function getDrops(Item $item){
-		if($item->isPickaxe() >= 1){
+		if($item->isPickaxe() >= Tool::TIER_WOODEN){
 			return [
 				[Item::IRON_DOOR, 0, 1],
 			];
diff --git a/src/pocketmine/block/IronOre.php b/src/pocketmine/block/IronOre.php
index 01e8be86d..cda415136 100644
--- a/src/pocketmine/block/IronOre.php
+++ b/src/pocketmine/block/IronOre.php
@@ -45,7 +45,7 @@ class IronOre extends Solid{
 	}
 
 	public function getDrops(Item $item){
-		if($item->isPickaxe() >= 3){
+		if($item->isPickaxe() >= Tool::TIER_STONE){
 			return [
 				[Item::IRON_ORE, 0, 1],
 			];
diff --git a/src/pocketmine/block/Lapis.php b/src/pocketmine/block/Lapis.php
index aa0b9212f..5cc8a2537 100644
--- a/src/pocketmine/block/Lapis.php
+++ b/src/pocketmine/block/Lapis.php
@@ -45,7 +45,7 @@ class Lapis extends Solid{
 	}
 
 	public function getDrops(Item $item){
-		if($item->isPickaxe() >= 3){
+		if($item->isPickaxe() >= Tool::TIER_STONE){
 			return [
 				[Item::LAPIS_BLOCK, 0, 1],
 			];
diff --git a/src/pocketmine/block/LapisOre.php b/src/pocketmine/block/LapisOre.php
index 44d6e9eeb..68ca5626e 100644
--- a/src/pocketmine/block/LapisOre.php
+++ b/src/pocketmine/block/LapisOre.php
@@ -45,7 +45,7 @@ class LapisOre extends Solid{
 	}
 
 	public function getDrops(Item $item){
-		if($item->isPickaxe() >= 3){
+		if($item->isPickaxe() >= Tool::TIER_STONE){
 			return [
 				[Item::DYE, 4, mt_rand(4, 8)],
 			];
diff --git a/src/pocketmine/block/MossStone.php b/src/pocketmine/block/MossStone.php
index 5700d5928..6476028f2 100644
--- a/src/pocketmine/block/MossStone.php
+++ b/src/pocketmine/block/MossStone.php
@@ -45,7 +45,7 @@ class MossStone extends Solid{
 	}
 
 	public function getDrops(Item $item){
-		if($item->isPickaxe() >= 1){
+		if($item->isPickaxe() >= Tool::TIER_WOODEN){
 			return [
 				[Item::MOSS_STONE, $this->meta, 1],
 			];
diff --git a/src/pocketmine/block/NetherBrick.php b/src/pocketmine/block/NetherBrick.php
index 937713b80..12400a516 100644
--- a/src/pocketmine/block/NetherBrick.php
+++ b/src/pocketmine/block/NetherBrick.php
@@ -45,7 +45,7 @@ class NetherBrick extends Solid{
 	}
 
 	public function getDrops(Item $item){
-		if($item->isPickaxe() >= 1){
+		if($item->isPickaxe() >= Tool::TIER_WOODEN){
 			return [
 				[Item::NETHER_BRICKS, 0, 1],
 			];
diff --git a/src/pocketmine/block/NetherBrickFence.php b/src/pocketmine/block/NetherBrickFence.php
index b42cdbd7f..62a182375 100644
--- a/src/pocketmine/block/NetherBrickFence.php
+++ b/src/pocketmine/block/NetherBrickFence.php
@@ -47,7 +47,6 @@ class NetherBrickFence extends Transparent {
 	}
         
 	public function getToolType(){
-		//Different then the woodfences
 		return Tool::TYPE_PICKAXE;
 	}
 	
@@ -61,9 +60,9 @@ class NetherBrickFence extends Transparent {
 	}
 
 	public function getDrops(Item $item){
-		if($item->isPickaxe() >= Tool::TYPE_WOODEN){
+		if($item->isPickaxe() >= Tool::TIER_WOODEN){
 			return [
-				[Item::NETHER_BRICK_FENCE, $this->meta, 1],
+				[$this->id, $this->meta, 1],
 			];
 		}else{
 			return [];
diff --git a/src/pocketmine/block/Netherrack.php b/src/pocketmine/block/Netherrack.php
index 8d3d5135a..7496ad14d 100644
--- a/src/pocketmine/block/Netherrack.php
+++ b/src/pocketmine/block/Netherrack.php
@@ -45,7 +45,7 @@ class Netherrack extends Solid{
 	}
 
 	public function getDrops(Item $item){
-		if($item->isPickaxe() >= 1){
+		if($item->isPickaxe() >= Tool::TIER_WOODEN){
 			return [
 				[Item::NETHERRACK, 0, 1],
 			];
diff --git a/src/pocketmine/block/Obsidian.php b/src/pocketmine/block/Obsidian.php
index cc93e4379..f483c58b9 100644
--- a/src/pocketmine/block/Obsidian.php
+++ b/src/pocketmine/block/Obsidian.php
@@ -45,7 +45,7 @@ class Obsidian extends Solid{
 	}
 
 	public function getDrops(Item $item){
-		if($item->isPickaxe() >= 5){
+		if($item->isPickaxe() >= Tool::TIER_DIAMOND){
 			return [
 				[Item::OBSIDIAN, 0, 1],
 			];
diff --git a/src/pocketmine/block/Quartz.php b/src/pocketmine/block/Quartz.php
index 5dacc3eb7..cbf0c432c 100644
--- a/src/pocketmine/block/Quartz.php
+++ b/src/pocketmine/block/Quartz.php
@@ -56,7 +56,7 @@ class Quartz extends Solid{
 	}
 
 	public function getDrops(Item $item){
-		if($item->isPickaxe() >= 1){
+		if($item->isPickaxe() >= Tool::TIER_WOODEN){
 			return [
 				[Item::QUARTZ_BLOCK, $this->meta & 0x03, 1],
 			];
diff --git a/src/pocketmine/block/Redstone.php b/src/pocketmine/block/Redstone.php
index c2707e016..41cd19d54 100644
--- a/src/pocketmine/block/Redstone.php
+++ b/src/pocketmine/block/Redstone.php
@@ -45,7 +45,7 @@ class Redstone extends Solid{
 	}
 
 	public function getDrops(Item $item){
-		if($item->isPickaxe() >= 1){
+		if($item->isPickaxe() >= Tool::TIER_WOODEN){
 			return [
 				[Item::REDSTONE_BLOCK, 0, 1],
 			];
diff --git a/src/pocketmine/block/RedstoneOre.php b/src/pocketmine/block/RedstoneOre.php
index 6b31c4090..2fb6df907 100644
--- a/src/pocketmine/block/RedstoneOre.php
+++ b/src/pocketmine/block/RedstoneOre.php
@@ -58,7 +58,7 @@ class RedstoneOre extends Solid{
 	}
 
 	public function getDrops(Item $item){
-		if($item->isPickaxe() >= 2){
+		if($item->isPickaxe() >= Tool::TIER_GOLD){
 			return [
 				[Item::REDSTONE_DUST, 0, mt_rand(4, 5)],
 			];
diff --git a/src/pocketmine/block/Sandstone.php b/src/pocketmine/block/Sandstone.php
index eab79265e..60bca024a 100644
--- a/src/pocketmine/block/Sandstone.php
+++ b/src/pocketmine/block/Sandstone.php
@@ -55,7 +55,7 @@ class Sandstone extends Solid{
 	}
 
 	public function getDrops(Item $item){
-		if($item->isPickaxe() >= 1){
+		if($item->isPickaxe() >= Tool::TIER_WOODEN){
 			return [
 				[Item::SANDSTONE, $this->meta & 0x03, 1],
 			];
diff --git a/src/pocketmine/block/Slab.php b/src/pocketmine/block/Slab.php
index 9bb0e3792..0bf6ae950 100644
--- a/src/pocketmine/block/Slab.php
+++ b/src/pocketmine/block/Slab.php
@@ -133,7 +133,7 @@ class Slab extends Transparent{
 	}
 
 	public function getDrops(Item $item){
-		if($item->isPickaxe() >= 1){
+		if($item->isPickaxe() >= Tool::TIER_WOODEN){
 			return [
 				[$this->id, $this->meta & 0x07, 1],
 			];
diff --git a/src/pocketmine/block/Stair.php b/src/pocketmine/block/Stair.php
index bb02a76d1..7416b6fd6 100644
--- a/src/pocketmine/block/Stair.php
+++ b/src/pocketmine/block/Stair.php
@@ -143,7 +143,7 @@ abstract class Stair extends Transparent{
 	}
 
 	public function getDrops(Item $item){
-		if($item->isPickaxe() >= 1){
+		if($item->isPickaxe() >= Tool::TIER_WOODEN){
 			return [
 				[$this->getId(), 0, 1],
 			];
diff --git a/src/pocketmine/block/Stone.php b/src/pocketmine/block/Stone.php
index 3b9eadd12..055731d7c 100644
--- a/src/pocketmine/block/Stone.php
+++ b/src/pocketmine/block/Stone.php
@@ -37,7 +37,6 @@ class Stone extends Solid{
 
 	public function __construct($meta = 0){
 		$this->meta = $meta;
-
 	}
 
 	public function getHardness(){
diff --git a/src/pocketmine/block/StoneBricks.php b/src/pocketmine/block/StoneBricks.php
index 0553f49a6..461a39e4e 100644
--- a/src/pocketmine/block/StoneBricks.php
+++ b/src/pocketmine/block/StoneBricks.php
@@ -55,7 +55,7 @@ class StoneBricks extends Solid{
 	}
 	
 	public function getDrops(Item $item){
-		if($item->isPickaxe() >= 1){
+		if($item->isPickaxe() >= Tool::TIER_WOODEN){
 			return [
 				[Item::STONE_BRICKS, $this->meta & 0x03, 1],
 			];
diff --git a/src/pocketmine/block/Stonecutter.php b/src/pocketmine/block/Stonecutter.php
index 3dc127c46..918011e3f 100644
--- a/src/pocketmine/block/Stonecutter.php
+++ b/src/pocketmine/block/Stonecutter.php
@@ -55,7 +55,7 @@ class Stonecutter extends Solid{
 	}
 
 	public function getDrops(Item $item){
-		if($item->isPickaxe() >= 1){
+		if($item->isPickaxe() >= Tool::TIER_WOODEN){
 			return [
 				[Item::STONECUTTER, 0, 1],
 			];