6 most common sizes of 3/4 drive impact sockets plus 2 square sockets, these super heavy duty sockets are made of high-grade Chrome Molybdenum alloy and built to last throughout ones professional career, and maybe farther. The flank design is meant to deliver maximum torque for all kinds of jobs without having chances of stripping and wearing damages to fasteners. The deep design allows users to accomplish jobs at hard to reach nuts and bolts without compromising the needed torque. Always insert a retaining pin and a locking O-ring to secure the sockets while operating a 3/4 impact wrench. A robust metal case is included for easy storage and transport.