Block Universal Gun Bench Block Two-Sided Tool Ideal for M1911 10 or 22s Pistol and Other Handguns Use for GunsmithingDrifting and staking assembly pinsHammer and sear pin removalMainspring removalBarrel link pin removalDrifting rear sightStaking the front sight, dressing the side railsDressing the ejector portGreat tool for disassembling andamp assembling Perfect for use on M1911 as well as other firearms such as Ruger 10 or 22 Fit: AR-15 Upper Receiver, Lower Receiver, Front Sight, and Charging HandleMade of non-marring urethaneRear sight drift channel, front sight staking channel and hammer and Sear pin removal holesEjector port dressing and rail dressing round bottom channels SIZE: 1-5 or 16" high, 4" in diameter.