[One-Hand Drill Design]: Tighten easily with one hand thanks to the exclusive one-sleeve design. [Applicable scope]: Suitable for 1050W power above impact drill bit, easily locks and releases drill bits, quickly convert your quick change hex shank driver into a drill. [Perfect Accessory]: The 1/4 inch universal hexagonal screwdriver easily attaches into the electric screwdriver, mainly used in automobiles, garages, warehouses, offices, etc. [Keyless]: The chuck holds round shank drills securely. [Installation]: Easy to use and install, keyless chuck converter goes from pipe to drill in seconds. Note: Please note that the new type and old type of this product will be sent at random and make sure you do not mind before ordering. Specifications: Chuck size Thread: 3 / 8Inch-24UNF Chuck diameter range: 0.8mm to 10mm With 1/4 inch hex chuck adapter Fits 9.3mm axle Material: plastic + metal The color black Chuck diameter: 40mm / 1.57 inch Chuck height: 50mm / 1.96inch Hex Chuck Adapter Size: L Dia / 50 6mm / 1.96 0.23 inch Package included: 1 Chuck 1 1/4 inch hex chuck adapter Note: 1. Please allow 1-3mm error due to manual measurement. Thank you for your understanding. 2. Monitors are not calibrated same, item color displayed in photos may be showing slightly different from the actual object. Please take the real one as standard.