The STEELMAN PRO 79358 20-Piece Heavy-Duty 3/4-Inch Drive Ratchet and Metric Impact Socket Set is ideal for performing maintenance, repairs and service on large trucks and trailers, farming equipment and tractors, oilfield and construction equipment, and mass transit vehicles. The 24-tooth reversible ratchet has a quick release button for easy socket changes and is made from durable chrome vanadium steel. The Sliding T-bar is forged from CrV steel and is included to help break free stubborn fasteners. The sockets are made from drop forged and heat treated chromoly steel and their 6-point shape grips the sides of fasteners and not the corners, reducing wear and rounding and their deep well design allows easy reach of nuts on extended threads and recessed bolts. Set includes 19mm, 21mm, 22mm, 23mm, 24mm, 26mm, 27mm, 29mm, 30mm, 32mm, 35mm, 36mm, 38mm, 41mm, 46mm, and 50mm size shallow sockets. To help reach recessed fasteners the set includes extension bars in 4-inch and 8-inch lengths. The sockets, extensions, and ratchet head feature a rust and corrosion resistant black phosphate protective coating while the ratchet handle and sliding T-bar have a polished chrome finish. Laser etched size callouts and markings on the sockets are easy to read and won't rub off or wear away with use. A powder coated metal storage case is included to keep the set organized between uses and ready for transport to the next job.