Clamp with nickel plated jaws Tightening wing nut that applies tension to jaws Additional holder is required to attach clamps to frames or other apparatus Minimum to maximum grip size: 6 to 12mm (0.24 to 0.47 in.) Length: 210mm (8.27 in.) Arm diameter: 11mm (0.43 in.) External arm length: 127mm (5 in.)