QUALITY MATERIAL - High strength keyless chuck made of HSS and ABS, very strong and durable, anti-abrasive, impact resistant. SIZE RANGE - The chuck size should be adjusted between 0.8-10 mm; Mounting: 3/8-24UNF; Shank: 1/4 inch. EASY TO USE - Simply plug it in, hand tighten your standard drill bit and you're done, ready to use standard SDS drill bits, it provides excellent smooth and fluid action and more. STRONG SUPPORT - With unique thrust bearing, delicate design, for strong grip simply by tightening the chuck, tight and stable. NOTE - The product can NOT be used counterclockwise! NOT suitable for impact drivers or applications involving high torque load. Keyless 0.8-10mm Capacity 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 keys - Allows screwdrivers with quick-change 1/4" Hex chucks to use round shank drill bits - Traditional 3-jaw design with 3/8" max capacity - Conveniently tighten with one hand with the exclusive one-sleeve design - Constructed from HSS and ABS plastic for extreme durability. Color: Black 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 ShankLonvre