●Base that bolts onto two studs while straddling an additional two, for solid, positive locating. fully adjustable pulling arms and stud adapters are quick andeasy to install. Includes most common 5/8" – 18 axle stud adapter set, additional adapter sets also availableReduces the risk of damage to axle studs ●Application : works on all medium to heavy-duty eaton and rockwell drive axles