DEWALT Impact Socket Set DWMT19251 1 4 Inch Drive Combination Socket Kit (48 Piece CR440 Steel Black Oxide DirectTorque Metric SAE Automotive Hardware) Saw Accessories this impact rated percussion tool adds this impact rated percussion tool adds extra shear angles to achieve twice the drilling speed of standard masonry bits under heavy structural loads a variable speed trigger lock Overhead Structural Assembly: Executing high torque industrial line fastening sequences where secure retaining pin socket locking is mandated for worker safety Ensuring the 6 point internal flats rest completely flush and square over the lower hardware shoulder forces the DirectTorque™ geometry to handle the initial shock pulse smoothly