Collets, ER-40 Individual Sizes

The 46mm length gives me plenty of grip for deeper setups, way more than my old stubby holders. Sizing is spot-on and the hardened surface hasn't shown a single chip after a month of swapping bits in and out.

The hardened tool steel really holds its grip tight without any flex, even when I’m torquing down on a 1/2" end mill. They seat smoothly into the nut every time, which is more than I can say for my old set.

The runout on these is noticeably better than the generic imports I was using before, and the hardened steel finish feels much more precise. They seat firmly in the nut without any binding, which is exactly what I needed for my milling work.