Material Cobalt steel High speed steel Cobalt steel Cobalt steel Black Oxide. Purpose Drill clean, accurate holes Drill clean, accurate holes Drill clean, accurate holes Drill clean, accurate holes Drill clean, accurate holes.
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Drill Bit Set 26529 29 Piece Pro Grade Cobalt 1/16 to 1/2, 135 Degree
Material Cobalt steel High speed steel Cobalt steel Cobalt steel Black Oxide. Purpose Drill clean, accurate holes Drill clean, accurate holes Drill clean, accurate holes Drill clean, accurate holes Drill clean, accurate holes.
5PCS M35 HSS Metal 3/8″ Cobalt Drill Bit Set for Hard Metal Stainless Steel Cast
【M35 Cobalt High Speed Steel】Industry grade M35 high speed steel drill bit set, much harder than HSS used in other similar drill bits set. These drill bits contain 5% Cobalt, which increases wear-resistance and durability.