Cobalt drill bits: Classic M2 High Speed Steel construction with Black and Gold finish for proven capability and durability.
Hardness: M2 Twist drill bits' Rock wall Hardness Level HRC 62-63.
Package & Size: 12 Pieces drill bits in a plastic bag, Diameter 9/32 inch, Total length 4-1/4 inch, Working length 2-15/16 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.