Ideal for high-torque applications, Dewalt Impact Ready nut drivers feature innovative recessed corners that can drive flats while minimizing shavings. An industrial-strength magnet maximizes fastener retention. Withstands up to 2000 inch lbs. of torque. Product designed for use in Impact Drivers and wrenchesRecessed corners is equal to drives on flats which minimizes shavingsIndustrial strength magnet maximizes fastener retention1/4 in. size