OTC 2-5/8 inch 6-Point Hexagon Truck Pinion Socket is designed and built to have the correct clearance for yoke and locknut assemblies on a variety of truck transmissions and differentials. The sockets have 3 inch of useable depth and are 4 inches long. Using the right tools saves time and effort, eliminating the need to destroy standard sockets by grinding them down to fit tight pinion clearances. The socket is 2-5/8 inch 6-point and is 3/4 inch drive. These sockets are designed for use with 3/4 inch square-drive manual tools only. Usage of impact tool voids sockets" warranty.