Features: Wide Range: Hex Shank suit for most power tools; General hexagon-handle input connection rod from 0.3mm to 8mm. Quality Material: Constructed with premium metal, strong, anti-rusting, suprer durability. One-handed Drilling: Gives you the free-dom of one-handed drilling and convenient for working in tight spaces. Easy Operation: Keyless chuck converter, easily the locks and releases drill bits, quickly change the hex shank driver unto a drill. Application: Can be used in Automotives, Garages, Warehouses, Offices, Home, etc. (Kindly Note: Please do NOT use counterclockwise!) Notice: 1.Actual color may be slightly different from the image due to different light effect 2.Please allow 1-3cm deviation due to manual measurement Description: Total length: 51/46/73/73mm Clampable twist-drill: 0.3-3.4mm/0.3-3.6mm/0.3-6.5mm/0.3-8.0mm Package List: 1x 0.3-8mm Drill Chuck