Irwin 7/8" HSS Step Drill Bit

I/N: 0028737
$145
Price correct as at Sat 23 Jun 2018 12:56:29pm
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Product Description

A step drill bit is a drill bit that has the tip ground down to a different diameter. The transition between this ground diameter and the original diameter is either straight, to form a counterbore, or angled, to form a countersink. The advantage to this style is that both diameters have the same flute characteristics, which keeps the bit from clogging when drilling in softer materials, such as aluminium.

  • Hole size: 7/8"
  • Shank diameter: 3/8”
  • Creates 7/8” knockouts quickly and easily. Especially suitable for making draw bolt holes for large knockouts and miniature pilot light holes

Product Details

Model Name
Step Drill
Model Number
10311ZR
Product Dimensions (mm)
W:25 H:25 L:65
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