Product Name:Higher type adjustable G-type woodworking clamps Maximum opening: 143mm Diameter of clamping piece: 39mm Product use: suitable for wood, plastic and other workpiece fixing, cutting, drilling clamping, free your hands! Please note: the physical slightly color difference or difference, does not affect the use, please do not mind, thank you! Colour:Black Material:Aluminum+Carbon Steel Package Contents: 2x adjustable G-type woodworking clamps Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.