QUALITY MATERIAL - High strength keyless chuck made of HSS and ABS, very strong and durable, anti-abrasive, impact resistant. The chuck size should be adjusted between 0.8-10mm; Fitment: 3/8-24UNF; Tail: 1/4 inch. EASY TO USE - Just plug it in, hand tighten your standard drill bit and you're done, ready to use standard SDS drill bits, it provides excellent smooth, smooth action and more. STRONG SUPPORT - With a unique thrust bearing, delicate design, for strong grip just by tightening the chuck, tight and stable. NOTE - the product CANNOT be used counterclockwise! NOT suitable for impact generators or applications involving high torque loading. 0.8-10mm Capacity Keyless Drill Chuck with 1/4 inch Hex Shank Quick Connect Adapter Conversion Tool A great accessory for all your drilling tasks This lightweight keyless chuck attaches to 1/4" hex wrenches Allows screwdrivers with 1/4" Hex quick-change chucks to use round shank drill bits Traditional 3-jaw design with a capacity of 3/8 max. Tighten conveniently with one hand with the exclusive one-sleeve design Constructed from HSS and ABS plastic for extreme durability. Specification: Shank Type: 1/4 inch hex shank Design: Classic 3-jaw keyless design Capacity range: 0.8-10mm / 0.08"-0.39" Mount: 3/8"-24UNF material: HSS and ABS plastic Note: The product CANNOT be used counterclockwise! Not suitable for impact drivers or applications involving high torque! Package included: 1 x keyless chuck with 1/4 inch hex shank