Features: * new and high quality . *Instantly converts drivers to hold non-quick change drill & driver bits *Keyless chuck finger tightens for easy bit changes *Quick-change hex shank for instant swaps, 1/4" drivers & quick-change adapters . *Easily locks onto and releases drill bits. *Allows hex drive power tolls to use conventional drill bits. Specifications: *Item Type: Drill Chuck *Material: Aluminum alloy(Drill Chuck) + Carbon steel(Shank) *Color: Black *Shank Type: 1/4" Hex Shank *Drill Chuck Range: 0.3-3.4mm / 0.3-6.5mm / 0.8-8mm Package Contents: 1x Keyless Drill Chuck Note: 1. The real color of the item may be slightly different from the pictures shown on website caused by many factors such as brightness of your monitor and light brightness. 2. Please allow slight manual measurement deviation for the data.