cobalt drill bits: classic M2 High Speed Steel construction with Black and gold finish for proven capability and durability. Hardness: M2 Twist drill bitsA Rock wall Hardness Level HRc 62-63. Package & Size: 12 Pieces drill bits in a plastic bag, Diameter 1964 inch, Total length 4-38 inch, Working length 3-116 inch. Professional & DIY Use: For use on metal, wood & plastics. Not For Use On concrete Masonry. Perfect match for workshop or service vehicles. 135 Tip & Twist Design: Increases cutting speed with self-centering and prevents walking, clears chips and particles faster.
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Item# : SPM13638149317
Model # : 1