DeWalt Impact Ready Pivoting Nut Drivers pivot up to 20 degrees to fit into tight spaces and corners. Recessed corners enable users to drive on flats, minimizing shavings to maintain a clean work area. An industrial-strength magnet maximizes fastener retention. Designed for impact drivers and wrenches. 3-1/2 In. long, sizes 1/4 In., 5/16 In., 3/8 In.