- HIGH DURABILITY: Crafted from premium alloy spring steel, processed to reach HRC 44-48 hardness level, and featuring precision-ground critical surfaces.
★ECCENTRIC DESIGN: The inside of the ER32 collet nut is intentionally designed like off-centering to help mount the ER32 collet much easier.
This collet size is true imperial fractional size, not a metric converting size and the surface on this collet has been specially treated to increase its tool life.