Made from engineering-grade resin, this block wont mar or damage your favorite guns and the outside rubber liner keeps the block from sliding on any surface when driving pins. And inside the block is a magnet that grabs dropped pins. So intelligently designed, youll feel smarter just using it. Specs Embedded magnet holds small pins securely Universal hole sizes accommodate most pin removals Non-slip outer ring steadies block during use Central groove steadies barrels Work surface made of ultra-tough engineering resin 1911 government model barrel bushing wrench on back side