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NMTB 40 Shell Mill 4" EXTENTION Holder Arbors 1 pc Arbor Diameter 3/4" for Shell End Mills 1-3/4" to 2" Arbor Diameter 1" for Shell End Mills 2-1/4" to 2-3/4" * NMTB 40 Draw Bar Threads 5/8" - 11 * Made of alloy forged steel for long, durable service life. * Hardened to RC 56-60 and ground to ensure maximum accuracy. * Shell mill Pilot T.I.R. 0.0004" We require a physical address on all items |