This Mossberg Pistol Grip Kit for 500/590 12-Gauge Shotguns will turn your ordinary 12-gauge shotgun into one that looks tactical while providing a sure grip and more steady aim with its molded finger grooves. This pistol grip fits Mossberg 500 and 590 12-gauge shotguns. The kit includes a pistol grip"" pistol grip bolt"" flat and lock washer"" rear stud"" front stud and washer and an Allen wrench so you have everything you need for installation.