Oversized, easy to feel bolt release button allows quick access during high stress situations when you need it most. Features a serrated face almost 1¼' long for a non-slip grip, with or without gloves. Constructed of 4140 ordnance steel with a black manganese phosphate finish for durability. Fits Benelli M1 Super 90, M3 Super 90, and Model 121 law enforcement shotguns. SPECS: Steel, black, matte finish. Button - 1?' (3.2cm) long x 5?8' (1.6cm) high.1 oz. (28.4g) weight.