59845W
https://www.vfoverride.com/shop/59845w-238499
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5 FL - Square - 0.5000" (1/2) Cutter DIA x 0.5000" (1/2) Shank DIA x 0.6250" (5/8) LOC x 2.5000" (2-1/2) OAL - TPLUS Coated