2-inch extension configuration High profile to accommodate larger objective scopes Double hex screws to hold your scope firmly in place 9-11mm models are fitted with a recoil stop pin Reversible dove tail clamp that fits 9-11mm and 3/8 inch Internal cushion tape prevents marking and damage High-grade aluminum anodized in matte black 1-inch rings Double hex screw fixings (rail & top cap) Height: 2" (51mm) Weight: 3.2 oz. (92g)