Foredom Handpiece Great for Flex Shafts. This is a new Foredom #30 handpiece. Allows you to use a wide variety of tools with one handpiece system because it firmly grips many tool shanks. Has grease sealed ball bearings that require no lubrication. Features a #0 geared 3 jaw Jacobs chuck. Comes with HPCK-0 chuck key. Accommodates shank sizes up to 5/32" (4 mm).