4pcs Drill Chuck Quick Change Adapter Mini 3- Drill Chuck Screwdriver Adapter Electric Drill Conver Universal Drive hex for easy access to electric screwdrivers.[Wide application] Quickly convert any 1/4 inch cordless electric screwdriver into a drill or grinder. One-handed operation ensures your work is working properly.1/4 inch hex - universal Drive 1/4 inch hex for easy access to electric screwdriversQuickly convert any 1/4 inch cordless electric screwdriver into a drill or grinderOne-handed operation ensures 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 is not possible with standard chuckscolour:Silver + blackMaterial:Aluminum alloy + carbon steelsize:90mm length Hexagonal handle drill chuck Clamping range: 0.3 mm-6.5 mm with 1/4 inch(6.35 mm)57 mm length Hexagonal handle drill chuck Clamping range: 0.3 mm-3.6 mm with 1/4 inch(6.35 mm)61 mm length Round handle drill chuck clamping : 0.3 mm-3.4 mm with 1/8 inch(3 mm )59 mm length Round handle drill chuck clamping : 0.3 mm-3.4 mm with 1/16 inch(2.35 mm ) Contents:4*Drill Chuck Quick Change AdapterOnly the above content, other are not included.Note: Light and different displays may the color of the item in the a little different from the real thing. The measurement allowed error is +/- 1-3cm.