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 0.8-10mm; 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 and fluid action and more. STRONG SUPPORT - With unique thrust bearing, delicate design, for strong grip just 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 loads. - A great accessory for all your drilling tasks - This lightweight keyless chuck attaches to 1/4" hex keys - Allows screwdrivers with 1/4" Hex quick-change 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. Specification: Type of Shank: 1/4 inch hex shank Design: Classic 3-jaw keyless design Capacity Range: 0.8-10mm / 0.08"-0.39" Material: HSS and ABS plastic Note: The product can NOT be used counterclockwise! Not suitable for impact drivers or applications involving high torque! Package Included: 1 x Keyless Chuck with 1/4 inch Hex ShankYeuri