Precision machined fixture fits in place of the trigger to hold the grip safety securely in place while fitting it to the top of the frame tangs. Adjustable screw and pin allows precise positioning and retension of the grip safety and frame. For best results, use with thumb safety and mainspring housing in place. SPECS: Anodized aluminum body, stainless steel screw and adjustment pin. Body is 1?” (4.45cm) long x ?” (.64cm) thick. Adjusts out to 2?” (6.9cm).