Real Avid AR15 Master Bench Block - Holds all key AR15 Parts to easily remove 13 different pins. The most comprehensive AR15 bench block ever allows you to tap 13 critical pins from 5 different components. The block is wrapped in an over-molding that grips to your bench to prevent slippage. Plus, engraved on the ultra-tough engineering grade surface are clear component labels marked with pin punch sizes to make determining what component to place where and what pins to use. Rubberized Non-Slip Outer SurfaceUpper ReceiverPin StorageEjector PusherFour Strong Magnets Under the BlockLower Receiver (Horizontal)