This 4 pc 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 in, 1 in and 1-1/8 in) 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.