The Taig mills and CNC lathe now come with an ER16 spindle. This is a standard ER type collet that allows you to take advantage of a wide range of precision collets to use for tool holding. If you have a different type of machine that uses ER16 collets these will work for you as well.
The ER16 collet set contains the following pieces (1/16", 1/8", 3/16", 1/4", 5/16", 3/8")
Individual collets are available as well, see link at bottom of page.