The H.18 is for use with only 2.35mm (3/32”) shank burs. A press lever action is all that is required to change accessories. It features a very slim grip and pre-lubricated ball bearings that do not require any lubrication. 7” long, 19/32” dia., wt. 3.65 oz., ship wt. 4.45 oz. Member of the Foredom system of ”Interchangeable Handpieces”