Features: Experience the ultimately efficiency with our 6piece electric wrench chuck set, ranging from 0.8-10mm, designing to fit 3/8-20unf thread specifications for a seamlessly power tool experience. Crafted from high carbon steel, this precisions engineered chuck set ensures durability and reliability, featuring electric designs that maximizes productivity while minimizing effort. For maintenance professional, mechanic, and diyer enthusiasts who frequently engages in wrenching tasks and appreciate tool that enhances their work efficiency. Whether you're tackling automotive repairs, home renovations, or machinery maintenance, this chuck set is your first solution for quickly and effortlessly tightening or loosening threaded fasteners. Elevates your toolkit with this essential accessory set, where robusts constructions meets convenience, ensuring that every twist and turn with your electric wrench is meet with unapproachable precisions and ease. Specifications: Component:High Carbon Steel Size:As Picture Shown Suitable for 3/8-20UNF thread specifications Package Includes: 6pcs/set Electric Wrench Chuck Head note: 1.Please allow 1-2cm errors due to manual measurement, make sure that you donot mind befores you order. 2.Due to the differences between different monitors, the picture may not reflect the actual colorings of the item. Thanks for your understandings.