*100% Brand new and high quality *Made of high-quality materials, durable and practical (3/8" x 24 UNF) keyless Drill Chuck: *Takes drill bits up to 10mm. *3/8" Unf female thread mount which fits all drills. *Keyless chuck for fast bit change. *Clamping range: 0.8-10mm *Thread:3/8-24UNF *Allows The Chuck To Be Used In Any Cordless Drill Hex Bit Holder *For Swapping Quickly Between Drilling Screwdriving Material: high speed steel 1/2" Dr to 1/4" Hex Adapter : *Quick Release Impact, Hex Shank Adapter *Material:Tungsten steel *Color:Black *used for hex shank Screwdriver bit,socket adapter,step drill,chamfer,wrench converter. Package Contents: 1pc 3/8" 10mm Keyless Chuck With Adaptor 1pc 1/2" Square to 1/4" Hex Shank Socket Adapter 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.