Gunsmith Bench Block Strong Nylon Material ● Made of reinforce nylon or 59 brass ● Work best for assembly and disassembly for M1911-style pistols as well as other firearms (Glock, 10/22s, etc.). ● The main spring removal groove; the front sight staking groove; ● Nylon surface to protect your precious firearm from scratches during gun drifting and staking. ● Customer’s OEM , logo, are acceptable.