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.