Use a Collet Adapter with collet-style handpieces to avoid changing collets for smaller accessory shank sizes. Precision machined adapter fits inside a rotary tool collet and allows the use of smaller shank size accessories without the hassle of changing the collet. Usage These are NOT standard 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 entire handpiece collets. Specifications Select a collet adapter for your Foredom Handpiece to quickly fit a wide range of carving burs and rotary accessories. HPL4-3233 fits 3/32" - 1/16" shanks HPL4-3234 fits 1/8" - 1/16" shanks HPL4-3235 fits 3.0mm - 3/32" shanks HPL4-3236 fits 1/8" - 3/32" shanks HPL4-3237 fits 3.0mm - 1.6mm shanks