Universal Drive hex for easy access to electric screwdrivers.[Wide application] Quickly convert any 1 or 4 inch cordless electric screwdriver into a drill or grinder. One-handed operation ensures that your work is working properly.1 or 4 inch hex - universal Drive 1 or 4 inch hex for easy access to electric screwdriversQuickly convert any 1 or 4 inch cordless electric screwdriver into a drill or grinderOne-handed operation ensures that your work is working properly0.3-6.5MM range - the chuck can be used with drills from 0.3mm to 6.5mm, making it perfect for fine drilling that is not possible with standard chuckscolour:Silver and blackMaterial:Aluminum alloy and carbon steelsize:90mm length Hexagonal handle drill chuck Clamping range: 0.3 mm-6.5 mm with 1 or 4 inch(6.35 mm)57 mm length Hexagonal handle drill chuck Clamping range: 0.3 mm-3.6 mm with 1 or 4 inch(6.35 mm)61 mm length Round handle drill chuck clamping : 0.3 mm-3.4 mm with 1 or 8 inch(3 mm )59 mm length Round handle drill chuck clamping : 0.3 mm-3.4 mm with 1 or 16 inch(2.35 mm )Package Contents:4xDrill Chuck Quick Change AdapterOnly the above package content, other products are not included.Note: Light and different displays may cause the color of the item in the a little different from the real thing. The measurement allowed error is 1-3cm.