
Universal: Hex shank approx. 6.35mm/1/4 inch, ideal for electric impact drills to convert impact drills and quick change drills Size: Shank input connection, general hex handle from 0.3mm to 6.5mm; Classic 3-jaw design securely holds a variety of twist drills Versatile use on impact drills and electric motors to quickly change tasks and keep the work going Made of metal for maximum durability. NOTE: The product CANNOT be used counterclockwise!