This Ed Brown Beavertail grip safety is designed to remove the maximum amount of metal from the frame without weakening it. The high sweep design gets your hand deep into the gun reducing felt recoil because of better alignment of the centerline of the bore with the axis of your forearm. It also improves your natural pointing ability leading to better accuracy. Uses a .250 radius cut on the frame centered on the thumb safety pin hole. Includes instructions. Installation requires modification to frame, gunsmithing required.Notes: Ed Brown grip safety installation jig, product # 226177 is recommended for installation of this grip safety