11.Suitable for ER type tool handle, tool bar, extension bar nut holding drill bit, boring cutter and other tools. 22.Strong clamping force is not easy to deform. Hardened and precision ground.Black Oxide Finish. 33.This collet nut is a great replacement for the broken part, fit most tool holders. 44.Very wear-resistant, high corrosion resistance, so very durable. 55.Suitable for ER25 chuck, tool handle and tool rod.
