Foredom Quick Change Handpiece Great for Flex Shafts. This is a new Foredom #52 quick change handpiece. Has a unique push/pull collet chuck release mechanism for rapid accessory changing. It has a lightweight, durable plastic barrel and grip. Has smooth running, pre-lubricated ball bearings that do not require additional lubrication. For use with 3/32" (2.35 mm) shanks.