ESCO HD STUD KLEEN Hub, Stud, & Wheel Cleaning Tool All-in-One hub and stud cleaning solution for Medium and HD Truck. Will clean up to 15 tractor-trailers (nearly 200 hubs) with one tool and beats out the competition 40- 1. Truck size for medium trucks with stud sizes of both 3/4” & 22mm. Removes rust, corrosion, and other debris that build up on tire rims, wheel studs, and brake drums with ease. Cleaning pads are exceptionally tough and will remove rust and other corrosion with ease – Will Not damage studs or other steel components. Abrasive Synthetic Cleaning Pads – Rugged and Heavy-Duty construction longer lasting than other competitive brands. No replacement parts necessary – one solid unit . Works off 1/2? Drive Impact – Air or Electric 50172 No -