The Wilson Combat 414S Bullet Proof Slide Stop for 45 ACP is engineered to withstand substantial impact, making it less likely to break or wear in a 1911 Auto. Uniquely designed, the Bullet Proof Slide Stops are fully carved from strong stainless-steel bar stock with additional metal in vital regions for extra strength. What sets this Bullet Proof Slide Stop apart is its material composition. It features a built-in detent, a serrated top, and a maximum tolerance shaft. Its seamless drop-in installation doesn\'t require any fitting for standard 1911 Autos. It is compatible with all codes in the .45 ACP Pkg.