Drives camshaft bearing smoothly , now ,one complete low cost set that will remove or insert camshaft bearings in nearly all engines from compact cars to heavy trucks. Range of 1.125" to 2.69" (28.58~68.3mm). Easy on bearings, the expander has a neoprene sleeve over which the split driving plugs are mounted and expanded to size This tool has two sets of rubber sleeves supplied with it fir each expanding drive. The brown sleeve are used when driving thin wall bearing (.065).the black sleeves should be used when driving thick wall bearing(.090). instruction sheet ATT12002010 provides complete, illustrated operating instructions and parts list Rang 1.125" to 2.690". Includes: Driving shaft, driving shaft extension, expander unit, five split driving plugs, two driving collars, centering cone and blow melded case.