Back Buddy II rolls under and bolts to brake drum and hub assemblies, then rolls out and lays over for servicing. Handles up to 350 lbs. Choose from 11 sets of adapters to fit inboard or outboard hubs on Class 5 through 8 tractors and trailers, as well as Humvees, a variety of military vehicles, and large fork lifts. Adapter system accommodates for new wheel designs. Hinged handle swings down allowing technician to wheel unit into tight spaces. Ratchet jack cranks loads up or down 14 ins. at a 3-in.-per-sec. rate.