HIGH QUALITY: This motor shaft bushing is made of high quality steel, rod with the clamping nut to tighten. Safety: The diameter of the extension rod and other parts are precision ground to eliminate imbalance, increase safety during cutting. PERFECT FOR DEEP PROCESSING: Straight elongated shank accommodates deep processing, meeting extension needs depth of treatment. WELL PACKAGED: This clamp is well packed in a protective container with a label for safe transportation and convenient storage. Widely Used: It is widely used in reaming, milling, drilling, tapping, grinding and other processing. Great replacement for you. Product Description This collet is made of high quality steel for milling lathe tools and tool holder engraving machines.< /p> ER straight shank type collet extension handle body is relatively long, suitable for deep hole machining. The nut can be clamped directly to provide powerful clamping force. Extension rod diameter and other parts are precision ground to