diff --git a/src/pocketmine/block/Block.php b/src/pocketmine/block/Block.php
index c6336651f..5d7663485 100644
--- a/src/pocketmine/block/Block.php
+++ b/src/pocketmine/block/Block.php
@@ -245,31 +245,12 @@ class Block extends Position implements BlockIds, Metadatable{
 			$base *= 5;
 		}
 
-		if($this->getToolType() === BlockToolType::TYPE_SHEARS and $item->isShears()){
-			$base /= 15;
-		}elseif($item instanceof TieredTool and ($this->getToolType() & $item->getBlockToolType()) !== 0){
-			switch($item->getTier()){
-				case TieredTool::TIER_WOODEN:
-					$base /= 2;
-					break;
-				case TieredTool::TIER_STONE:
-					$base /= 4;
-					break;
-				case TieredTool::TIER_IRON:
-					$base /= 6;
-					break;
-				case TieredTool::TIER_DIAMOND:
-					$base /= 8;
-					break;
-				case TieredTool::TIER_GOLD:
-					$base /= 12;
-					break;
-			}
+		$efficiency = $item->getMiningEfficiency($this);
+		if($efficiency <= 0){
+			throw new \RuntimeException("Item efficiency is invalid");
 		}
 
-		if($item->isSword()){
-			$base /= 1.5;
-		}
+		$base /= $efficiency;
 
 		return $base;
 	}
diff --git a/src/pocketmine/block/Wool.php b/src/pocketmine/block/Wool.php
index 0ea673804..a58d156d7 100644
--- a/src/pocketmine/block/Wool.php
+++ b/src/pocketmine/block/Wool.php
@@ -24,6 +24,7 @@ declare(strict_types=1);
 namespace pocketmine\block;
 
 use pocketmine\block\utils\ColorBlockMetaHelper;
+use pocketmine\item\Item;
 
 class Wool extends Solid{
 
@@ -45,4 +46,12 @@ class Wool extends Solid{
 		return ColorBlockMetaHelper::getColorFromMeta($this->meta) . " Wool";
 	}
 
+	public function getBreakTime(Item $item) : float{
+		$time = parent::getBreakTime($item);
+		if($item->getBlockToolType() === BlockToolType::TYPE_SHEARS){
+			$time *= 3; //shears break compatible blocks 15x faster, but wool 5x
+		}
+
+		return $time;
+	}
 }
\ No newline at end of file
diff --git a/src/pocketmine/item/Item.php b/src/pocketmine/item/Item.php
index 85361f444..d6c066688 100644
--- a/src/pocketmine/item/Item.php
+++ b/src/pocketmine/item/Item.php
@@ -789,7 +789,7 @@ class Item implements ItemIds, \JsonSerializable{
 		return false;
 	}
 
-	public function getDestroySpeed(Block $block, Player $player){
+	public function getMiningEfficiency(Block $block) : float{
 		return 1;
 	}
 
diff --git a/src/pocketmine/item/Shears.php b/src/pocketmine/item/Shears.php
index 87e7ca416..f6caad3c3 100644
--- a/src/pocketmine/item/Shears.php
+++ b/src/pocketmine/item/Shears.php
@@ -23,7 +23,6 @@ declare(strict_types=1);
 
 namespace pocketmine\item;
 
-
 use pocketmine\block\BlockToolType;
 
 class Shears extends Tool{
@@ -46,4 +45,8 @@ class Shears extends Tool{
 	public function getBlockToolHarvestLevel() : int{
 		return 1;
 	}
+
+	protected function getBaseMiningEfficiency() : float{
+		return 15;
+	}
 }
\ No newline at end of file
diff --git a/src/pocketmine/item/Sword.php b/src/pocketmine/item/Sword.php
index 8526fecff..baea5ee1b 100644
--- a/src/pocketmine/item/Sword.php
+++ b/src/pocketmine/item/Sword.php
@@ -23,6 +23,7 @@ declare(strict_types=1);
 
 namespace pocketmine\item;
 
+use pocketmine\block\Block;
 use pocketmine\block\BlockToolType;
 
 class Sword extends TieredTool{
@@ -42,4 +43,12 @@ class Sword extends TieredTool{
 	public function getBlockToolHarvestLevel() : int{
 		return 1;
 	}
+
+	public function getMiningEfficiency(Block $block) : float{
+		return parent::getMiningEfficiency($block) * 1.5; //swords break any block 1.5x faster than hand
+	}
+
+	protected function getBaseMiningEfficiency() : float{
+		return 10;
+	}
 }
\ No newline at end of file
diff --git a/src/pocketmine/item/TieredTool.php b/src/pocketmine/item/TieredTool.php
index 3a1b9ab46..33bb9e2c6 100644
--- a/src/pocketmine/item/TieredTool.php
+++ b/src/pocketmine/item/TieredTool.php
@@ -77,4 +77,24 @@ abstract class TieredTool extends Tool{
 
 		return $levels[$tier];
 	}
+
+	public static function getBaseMiningEfficiencyFromTier(int $tier) : float{
+		static $levels = [
+			self::TIER_WOODEN => 2,
+			self::TIER_STONE => 4,
+			self::TIER_IRON => 6,
+			self::TIER_DIAMOND => 8,
+			self::TIER_GOLD => 12
+		];
+
+		if(!isset($levels[$tier])){
+			throw new \InvalidArgumentException("Unknown tier '$tier'");
+		}
+
+		return $levels[$tier];
+	}
+
+	protected function getBaseMiningEfficiency() : float{
+		return self::getBaseMiningEfficiencyFromTier($this->tier);
+	}
 }
\ No newline at end of file
diff --git a/src/pocketmine/item/Tool.php b/src/pocketmine/item/Tool.php
index 67191c02a..b825b3cd7 100644
--- a/src/pocketmine/item/Tool.php
+++ b/src/pocketmine/item/Tool.php
@@ -66,4 +66,18 @@ abstract class Tool extends Durable{
 	public function isTool(){
 		return true;
 	}
+
+	public function getMiningEfficiency(Block $block) : float{
+		$efficiency = 1;
+		if(($block->getToolType() & $this->getBlockToolType()) !== 0){
+			$efficiency = $this->getBaseMiningEfficiency();
+			//TODO: check Efficiency enchantment
+		}
+
+		return $efficiency;
+	}
+
+	protected function getBaseMiningEfficiency() : float{
+		return 1;
+	}
 }
\ No newline at end of file