Material: HSS / 5% Cobalt. 13 Piece 5% Cobalt HSS Drill Bit Set. - The set features a ground flute for increased accuracy when drilling. Includes useful case for quick and convenient storage. - 13PCE Cobalt Drills (1.5 - 6.5mm) are manufactured from high-speed steel with 5% cobalt for the highest durability.
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