Brownells Deluxe Rear Sight Rebuild Kit includes the essential hardware for rebuilding and repairing Smith & Wesson rear sights. Kit contents include windage nuts, windage screws, a rear sight plunger, a rear sight plunger spring, a rear sight elevation stud, and a rear sight spring clip. The package also includes specialized tools for correct installation, notably the Smith & Wesson sight nut spanner (Magna-TIp bit) designed to fit the windage components.