Premium QualityMade of premium chrome vanadium steel; Drill chuck capacity: 1.5-13mm (0.06-0.5 inch); Mount: 1/2-20UNF 1/4" Hex ShankThe hex shank chuck adapter can quickly connect to any impact driver and converts to drilling function. ConvenientJaws are specially treated to improve wear resistance; Versatile use on hammer drills and electric screwdrivers. Excellent Clamping CapacityDesign Classic 3-jaw, securely holds a wide range of twist drills and step drills with 1/16" to 1/2" shank Please NoteThe chuck can NOT be used counterclockwise!Must transfer to ''impact drill stalls''! 1.5-13mm Capacity 1/2-20UNF Impact Drill Chuck w/ Hex Shank 1 /4" and Chuck Key stainless steel casting, wear-resistant and impact resistant. Polishing surface is anti-oxidation , waterproof and anti-corrosion. Easy to assemble, can be used for electric drill, electric drill, etc. Exquisite workmanship ensures stable performance and long service life. Classic 3-jaw chuck, quick change and easy locking. The chuck is suitable for drilling machine tools and lathes and working Related. Chuck Specification: Material: Chrome Vanadium Steel (CR-V) Hex Shank Diameter: 6.35mm (1/ 4 inch) Clamp Range: 1.5-13mm (1/16 - 1/2 inch) Mounting Thread: 1/2" (13mm) - 20UNF< /p> Please Note: The product can NOT be used counterclockwise! Must be transferred within '' hammer drill stalls'', when using the hammer chuck, other stalls will drive the chuck broken. Prevent waste flying at work, please use safety goggles and gloves. safety. The surface of this product may be scratched due to collisions in the transportation process, but it will not affect normal use, please rest assured to buy. Welcome to if you have any problem, we would love to help you solve it. Package Included: 1 x Chuck 1 x chuck key 1 x 1/4" hex shank Note: Due to the light and screen setting difference, the item's color may be slightly different from the pictures. Please allow slight dimension difference due to different manual measurement. Sold by-YJL official store