Features With high quality material and sturdy structure, the tap holder is very stable and durable for long use. The great accuracy together with large torsion promises excellent drilling performacne with high efficiency. The clamping range of the tapping chuck is M5 to M20, so you can apply various screw taps on it. The compact size and light weight make the annular cutter arbor very easy to carry and store. Ideal for tapping machine tools, milling machines, high‑speed lathes, CNC machining centers, etc. Specification: Item Type: Annular Cutter Arbor Product Model: TC20-MT4 Product Material: 40Cr Function: Suitable for tapping machine tools, milling machines, high-speed lathes, CNC machining centers and other reversible spindles. Accuracy: 0.03mm Clamping Range: M5-M20 (1/36-3/4 inch system) Hardness: HRC45-48 Applicable Machine Tool: Drilling Machine Taper: MT4 Package List:1 x Annular Cutter Arbor2 x Wrench Package List 1 x Annular Cutter Arbor 2 x Wrench