Features and Benefits: Light durable composite construction for long life Provides a convenient way to smoothly and quickly position a bearing in the inner hole of an axle Includes a handle grip and six heavy-duty bearing drivers The drivers have different diameters in order to match different-sized bearings and three of the drivers are formed with two different diameters Comes in a convenient blow molded case Bearing driver sizes: 1.555 (39.5 mm) 1.752 (44.5 mm) 1.968 (50.0 mm) 2.322 (59.0 mm) 2.48 (63.0 mm) 2.559 (65.0 mm) 2.834 (72.0 mm) 2.992 (76.0 mm) 3.189 (81.0 mm)