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 for each expanding driver.

The brown sleeves are used when driving thin wall bearings (.065"). The black sleeves should be used when driving thick wall bearings (.090").

Range: 1.1/8" to 2.11/16" (28 to 68mm).