The H.8 is a slim collet type handpiece with pre-lubricated ball bearings that require no additional lubrication. It has a chuck guard that slides back when changing burs. Comes with 2.35mm (3/32") and 3.17m (1/8") collets and chuck wrenches for changing collets and accessories.15.55cm (6-1/8") long, 1.58cm (5/8") diameter.