Ultimate Arms Gear Universal Shotgun Forend Handguard Steel Gunsmith Wrench Tool For 12 Gauge Mossberg Remington And Winchester Shotguns Universal 12 Gauge Shotgun Forend - Handguard (Action) Slide Nut Wrench Great For the Slotted Forend Nut On Most 12 Ga Shotguns Including: Mossberg 500/590/835 (will not fit model 500A or where forends are non removable), Remington 870, Winchester 1200/1300 Hiigh Quality Steel Construction Lets You Install / Remove Your Handguards - A Great Tool To Have!