Features:Universal for flex shaft machine, suitable for grinding wheels with a shank diameter of 0.3~4mm.This handpiece allows you to quickly change accessories.Low vibration and low heating production during operation.Commonly used in the processing of jewelry and crafts.Made of high quality metal, strong and durable in use.Knurled ring design, easy to hold.Specifications:Material: SteelClamping Range: 0.3-4mmSize: 14*2.5cm / 5.5*1.0inWeight: Approx. 180g / 6.3oz Package List:1 * Shank1 * KeyPackage List1Universal for flex shaft machine, suitable for grinding wheels with a shank diameter of 0.3~4mm. 2This handpiece allows you to quickly change accessories. 3Low vibration and low heating production during operation. 4Commonly used in the processing of jewelry and crafts. 5Made of high quality metal, strong and durable in use.