Foredom HPHL-3234. Collet Adaptor, Reducing 1/8" to 1/16". These are NOT collets. You can use them with Foredom Flex Shaft Handpieces or Micromotor Handpieces — as long as the handpiece has a collet. They are ‘step down’ adapters that fit inside a collet and allow the use of smaller shank size accessories. No need to change handpiece collets.