ITEM NAME:Plastic Self-tightening Drill Bits Chuck Screwdriver Impact Driver Adapter #JT1 Product Description Description: Features: Allow chuck for any hex shank drill holder of cordless drill. For quick replacement between drilling and screw tightening. Simple twist tightening and releasing. Specifications: Material: plastic Clamping diameter: 0.8-10mm/0.03-0.39" Scope of application: 10mm/0.39" electric drill with teeth. Size: 80*50*50mm/3.15*1.97*1.97" Notes: 1. Due to the different monitor and light effect, the actual color of the item might be slightly different from the color showed on the pictures. Thank you! 2. Please allow slight measuring deviation due to manual measurement. Included: 1 x Drill Bits Chuck.Simple twist tightening and releasing. Included: 1 x Drill Bits Chuck. Allow chuck for any hex shank drill holder of cordless drill. Scope of application: 10mm/0.39" electric drill with teeth. Material: plastic.