This tool has two sets of rubber sleeves supplied with it for each expanding driver. Range of 1.1 25" to 2.69" (28.58 - 68.3mm). Very easy on the bearings. The expander has a neoprene sleeve This tool drives camshaft bearings 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 1.1 25" 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.