Feature: Comfortable surface of sleeve and positive gripping can apply more output torque. By using specialized anti-thrust bearing to convert hand-applied torque into superior gripping force. Aesthetic and practical design of surface make sure the front and rear sleeve cooperate with each other more effective and reduce the run out of sleeve. Unique structure, can very good clamp bit head. The clamping range of chuck is 0.8-10mm. Spec:Material: ABSClamping range: 0.8-10 mmConnection thread: 3/8-24UNFPackage list:1 * Keyless ChuckNotice:The actual product color may deviate from the photo due to light.There may be a slight deviation in the measurement of product.