These are the STRONGEST pins that can be produced and were designed to withstand the high impact of full and semi-auto 9mm" .223" and 7.62mm suppressed weapons. The pins are stainless steel. Black side plates are black nitride treated, all other color options are DuraCoated. An absolute must-have for all M-16 owners. They will also protect your AR-15.Features :11 Inch/Lb. Maximum Torque Spec- 8 Inch/Lb. SuggestedWithstands Semi and Full-AutoPrevents Pins from Moving While Weapon is Fired