The AR-15 Master Bench Block from Real Avid is designed for fast and safe removal of 13 critical pins that make up the AR-15 platform. Clearly engraved and molded for quick reference the unique design captures the removed pins, saving them from escaping your work area thanks to embedded magnets. Whether installing an A2 front sight block, upgrading a charging handle, or fleshing out a lower reciever, the AR-15 Master Bench Block will make the task a breeze.Features: Four strong magnets under block to capture pins Engineering grade resin provides a long-lasting work surface Rubierzed non-slip outer edge Pin storage area Clearly marked for ease of use Protects components from damage caused by lack of supportWorks for: Bolt 1/16" and 3/32" pins Ejector Pusher Gas block 1/8" and 5/64" pins Forward Assist 3/32" pins Charging Handle 5/64" pins Trigguer Guard 1/8" pins Trigger / Hammer 5/32" pins