Morse Arbors - MT4 to M20 Arbor for M8-M20 Auto-Reversing Tapping Head. Morse Arbors - MT4 to M20 Arbor. Precision ground morse taper chuck arbor. Suitable for use with our tapping heads. Compatibility with M8-M20 (5/16-3/4) Auto-Reversing Tapping Head - MT-TH-8-20.
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