Feature:-Unique patented locking function, breaking the traditional locking methods. -After the ratchet, the locking components mounted on the rear collet, locking circumferential length, more effective in preventing loose removal, the collet is more reliable when gripping means. -Good metal with texture, comfortable sweatshirt. -Torque thrust bearing, unique easy grip exerted translates into greater clamping force. -Range: suitable for 1050W more power hammer drill. Specifications: Product Name: Drill Chuck Material: High Speed Steel Color: Black & Silver Length: Approx. Shank Diameter 85mm/3.34": Approx. 6mm/0.23" Clamping Range: 0.8-10mm/0.031"-0.39" Quantity: 1pc. Package Includes: 1x Drill Chuck