1H17 4mm 2 FLUTE SLOT DRILL

Ninja trick for chain drilling: Lay out an odd number, drill the odds first then the evens That way the material on either side of the hole

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2 slot gpu STARKE 4mm 2 Flutes Ball Nose Coated Carbide Slot Drill 4x8x4x50

ddr3 vs ddr4 slot Drill the holes in the piece, secure it in a vice rough it out with a hacksaw and then use a file and sand paper to finish to required size