DNA Collets = Dead Nuts Accurate!

DNA Collets are the best way to hold tools 6mm and smaller!

For consistent T.I.R. of 0.0002" or better, and improved tool life use DNA collets and nuts.

DNA collets fit standard ER pockets

DNA collet (left) works with standard ER tool holders. ER collets 6mm and smaller allow 40% of the collet to extend out of the collet pocket. This means 40% of the jaws surface area does not properly collapse on the tool shank because they are unsupported by the walls of the pocket.


  • Extend tool life & reduce costs
  • High rigidity & high holding power
  • Best for 6mm or smaller tool

DNA collets put more metal on the tool shank!

DNA collets hold shanks tighter

Small size ER collets have a large counter-bore in the I.D. at the bottom, (see illustration) that greatly reduces the amount of metal holding the shank of the tool. DNA collets have twice as much metal gripping the tool shank “in the pocket” where maximum holding power is generated as the collet nut is tightened.

ER inch collets

DNA 11 Collets
ER inch collets

DNA 16 Collets
ER inch collets

DNA 20 Collets
ER inch collets

DNA 32 Collets