This 4-Piece Klein Tools Impact Socket Set with the 5-in-1 Mini Impact Socket and 3-in-1 Flip Impact Socket is perfect for Linemen and Utility Workers. 5-in-1 Impact Socket features three popular square sizes (3/4-Inch, 1-Inch and 1-1/8-Inch) that can be quickly converted for a variety of utility type applications. The 3-in-1 Flip Impact Socket combines two of the most common socket sizes into one tool. The high-torque, 12-Point design is easier to position and works with square fasteners.