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Carbide Square End Mill - 1/8 Shaft - 0.5mm Diameter : ID 2072 : $3.95 : Adafruit Industries, Unique & fun DIY electronics and kits
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Fullerton Tool 27104 | 1/4" Diameter x 1/4" Shank x 1-1/4" LOC x 3" OAL 3 Flute Uncoated Solid Carbide Square End Mill - All Industrial Tool Supply
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Accupro - Ball End Mill: 0.5" Dia, 1" LOC, 4 Flute, Solid Carbide - 09137795 - MSC Industrial Supply
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Accupro - Square End Mill: 1/2" Dia, 1" LOC, 4 Flutes, Solid Carbide - 01982826 - MSC Industrial Supply
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