Description: Heavy duty and strong stainless steel Compatible with impact drill and different power electric drill. Suitable for milling machine, lathe, drilling machine, wood working machine. Clamping Range: Approx. 0.3-4mm/ 0.01-0.16inch Fit 6mm diameter motor shaft Specification: Material: Stainless Steel Drill Chuck Outer Diameter: Approx. 21mm/ 0.83inch Drill Chuck Inner Diameter: Approx. 6.25mm/ 0.25inch Package Includes: 1 Piece 0.3-4mm Drill Chuck 1 Piece Drill Wrench 1 Piece Drill Shaft 1 Piece L-wrench Note: Due to the light and screen setting difference, the item's color may be slightly different from the pictures. Please allow slight dimension difference due to different manual measurement