Xntrix Quad Clamp. Blue. Suitable for standard size bars (31.8mm) Overall Height 80mm Unique 2 Piece design with 8 high tensile screws providing superior clamping over traditional one piece single split clamps UK designed & manufactured in our own precision engineering company Xntrix clamps are produced using the latest CNC machinery from solid aluminium grade 6082 Anodized for the ultimate in style & performance