Designed for everything from Commercial trucks, RV'S, tractor Trailers to farms machinery, heavy equipment, and much more. Trans-speed ratio 1:78 Material: High-quality alloy steel Maximum safe output: 7500 N/M Rocking bar length: 15-3/8" Package includes: 4 free sockets: 41mm (1-5/8"), 38mm(1-1/2"), 33mm(1-5/16"), and 21mm(13/16") - 4 point square (for square duel lug studs); 75mm tall. 1" Drive.