The RISE Armament Anti Walk Trigger Pins ensure secure installation of your drop-in trigger. They also improve the reliability of your rifle by eliminating the tendency for standard pins to walk out over time. The RISE Anti Walk Trigger Pins set includes all of the following: One (1) trigger pin, One (1) hammer pin, Four (4) screws, Two (2) Allen wrenches for easy installation. Also, the specs are as follows: Pin diameter .154 inches, Pin material: Stainless steel, Backed by lifetime guarantee, Made in America. The torque spec on the screw is 11 inch-pounds maximum; however, 8 inch-pounds of torque is the recommended amount.