Value of a delicate clamp, give you a cool experience. -Good metallic and comfortable coat surface. -Unique torque thrust bearing is easy to handle applied translate into greater clamping force. Specification: Colour: black Material: metal Hole dia: 13mm Clamping range: 2-13 mm Package include: 1x drill chuck Note: Light shooting 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.