The H.20 is for exclusive use with 3/32″ (2.35mm) shank burs. A lever action on the the handpiece body is all that is required to change accessories. It has a molded plastic front grip with tapered sides for easy and close handling, plus pre-lubricated ball bearings that do not require additional lubrication. The collet in this handpiece can be replaced and/or adjusted if the hold on a bur shank is not secure. Watch the video for instructions on making collet adjustments.  Please call us for additional Foredom items or parts not listed on this website.