The H.44HT is a collet type square drive handpiece that accepts accessories with up to 1/4" diameter shanks. Has positive locking mechanism (locking ring) for use with Series SRH, TXH, LXH and discontinued H motors and pre-lubricated ball bearings that do not require maintenance. Comes with 3/32", 1/8" and 1/4" (installed) collets, pin and wrench for changing collets and accessories. Specification6-1/4" long, 1" dia. (center), 3/4" dia. (taper), ship wt. 8.85 oz.