H.10 is a slender handpiece with rotating lever action that releases and closes the collet for quick and easy changes. It is one of the few Foredom handpieces that requires some lubrication. Be sure to read/download Handpiece Instructions, available under the downloads tab,for proper use and lubrication. For use only with 2.35mm (3/32″) burs. 7-3/8″ long, 21/32″ dia., wt: 4.55 oz, ship wt: 5.5 oz.H.10 is a standard key tip handpiece.