ITEM NAME:Electric Drill Chuck 0.6-6mm Thread 3/8-24UNF 1/4"Hex Shank Power Tools #gib Product Description Description: Features: For milling machine, lathe, drilling machine, wood working machine The shank with screw can be tight and flex for you Specification: Material: Metal Mount Thread: 3/8-24UNF Weight: Approx.118g Specifics: Approx.6.5mm/0.26" Included: 1 Set of Chuck.The shank with screw can be tight and flex for you. Included: 1 Set of Chuck. Mount Thread: 3/8-24UNF. If item is defective after 3 months, you can still send it back to us. We will send you a new one after receiving the defective item.