Triple Torx screws to hold your scope firmly in place Recoil Pin Stop Rail 9-11mm Internal cushion tape prevents marking and damage High grade aluminium anodized in matte black 1in 2 Piece 9-11mm Medium Configuration: 2 Piece Ring Size (Diameter): 1 / 25.4mm Height: Medium Rail: 9-11mm Fixings (Top Cap): Triple Torx Screw Fixings (Rail): Double Hex Screw Internal Cushion: YES Retractable 'Recoil Stop' Pin: YES Height: 43mm / 1.7 Weight: 120g / 4.2oz 1in 2 Piece 9-11mm High Configuration: 2 Piece Ring Size (Diameter): 1 / 25.4mm Height: High Rail: 9-11mm Fixings (Top Cap): Triple Torx Screw Fixings (Rail): Double Hex Screw Internal Cushion: YES Retractable 'Recoil Stop' Pin: YES Height: 48mm / 1.9 Weight: 126g / 4.4oz 1in 2 Piece 9-11mm Extra High Configuration: 2 Piece Ring Size (Diameter): 1 / 25.4mm Height: Extra High Rail: 9-11mm Fixings (Top Cap): Triple Torx Screw Fixings (Rail): Double Hex Screw Internal Cushion: YES Retractable 'Recoil Stop' Pin: YES Height: 54mm / 2.1 Weight: 132g / 4.7oz