- Made from high-carbon steel and heat-treated for long life
- Precision ground and polished
- Each collet individually inspected for quality
SlimPro collets are longer overall than ER collets and feature a 4˚ taper, so there is more engagement with the tool shank and the drawbar clamping holds more securely then ER. Also the holder assembly is better balanced than ER since there is no collet nut needed.