Impact driven heavy-duty Expander allows for fitting smaller exhaust piping and making exhaust seals The 28mm drives the tool and the collet sets expand pipes from 1-5/8" To 4-1/4" Includes: steel expander 1 5/8" - 2" Collet, steel expander 2" - 2 1/2" Collet, 2 3/8"- 2 3/4" Collet, 2 3/4" - 3 1/8" Collet, 3 1/8" - 3 1/2" Collet, 3 1/2" - 3 7/8" Collet, 3 7/8" - 4 1/4" Collet, Weight: 10.44 Pounds, Manufacturer: Astro Pneumatic Tool