High speed steel with black oxide coating for corrosion resistance

5 flute design reduces vibration for smoother drilling

Precision-ground 82 deg (degree) tip for countersinking into most machinable metals

1/4" round shank compatible with all hand held and stationary drills

Set includes 1 each: 1/2" Model No

12411 (SKU 325880), 5/8" Model No

12412 (SKU 325899), 3/4" Model No

12413 (SKU 325902)