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 wrenches.Recessed corners- drives on flats which minimizes shavings.Industrial strength magnet maximizes fastener retention.7/16 in. size.