1、With heat treatment, the product has good toughness and higher structural strength. 2、Good metal texture, comfortable coat surface, easy to clamp, so that the output torque becomes larger. 3、The unique thrust bearing is easy to convert the torque applied by the handle into greater clamping force. 4、Beautiful and practical surface concave and convex design, so that the front and rear jackets can effectively cooperate and reduce the jacket shaking. 5、Scope of application: Applicable to AC electric drills with power below 700W and various DC electric drills. Feature: With heat treatment, the product has good toughness and higher structural strength. Good metal texture, comfortable coat surface, easy to clamp, so that the output torque becomes larger. The unique thrust bearing is easy to convert the torque applied by the handle into greater clamping force. Beautiful and practical surface concave and convex design, so that the front and rear jackets can effectively cooperate and reduce the jacket shaking. Scope of application: Applicable to AC electric drills with power below 700W and various DC electric drills. Specification: Material: High Speed Steel Applicable machine: Impact drill Specification: 2-13mm 1/2 Hand-clamped drill chuck: all-metal self-locking 13mm drill chuck Scope of application: Applicable to AC electric drills and DC electric drills with power below 700W Weight: 282g / 9.9oz Package list: 1 x Drill Chuck Note: 1. The actual product color may deviate from the photo due to light. 2. There may be a slight deviation in the measurement of product.3. Please note that the new type and old type of this product will be sent randomly, and make sure you will not mind before ordering.