Three-Flute HSS Solid Cap Screw Counterbores

3 Flute Solid Cap Screw Counterbores

Designed to counterbore for all the standard size cap screws, these tools feature solid construction and a solid pilot that is .001″ to .002″ undersize for ease of entry.
The design allows for almost unlimited re-grind life.

Features:

• For Socket Head Cap screw
• Straight Shank
• HSS 6542, 2.4 times longer lifetime than general HSS 4241
• Smooth chip flow and powerful cutting resistance because of 3 lips for regrinding