Q: Why is this sharpened after hardening?
Sharpening after hardening, rather than before, shapes the cutting edge at its final hardness, which keeps it sharper through more use than a countersink sharpened before hardening.
07J0501 - #5 Countersink/Counterdrill, 3/8" Bore
Screw Size:
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Our countersink/counterdrills (unlike most others) are hardened, then sharpened after hardening.They have a 3/8” bore for #5-#9 screws, and 1/2" bore for #10, #12 and #14 screws. Also available in boxed sets with taper drill bits, stop collars and hex keys.
Sharpening after hardening, rather than before, shapes the cutting edge at its final hardness, which keeps it sharper through more use than a countersink sharpened before hardening.
The 3/8" bore countersink/counterdrill fits #5 through #9 screws, while the 1/2" bore covers #10, #12 and #14.
Yes, it's also available in boxed sets with taper drill bits, stop collars and hex keys, if you'd rather have a complete kit than buy pieces individually.
Yes, the boxed sets come in two sizes: a smaller option and a complete set spanning all eight screw sizes, each pairing the countersink/counterdrills with matching taper drill bits, stop collars and hex keys.
| Compatibility Dimensions | Accepts #5 to #9 screws (3/8" bore); accepts #10, #12 and #14 screws (1/2" bore) |
| Includes | Countersink/counterdrill |
| Package Quantity | 1 item |
| Warranty | Lee Valley Satisfaction Guarantee |
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Screw Size
Variations:
Countersink/Counterdrills
Our countersink/counterdrills (unlike most others) are hardened, then sharpened after hardening.They have a 3/8” bore for #5-#9 screws, and 1/2" bore for #10, #12 and #14 screws. Also available in boxed sets with taper drill bits, stop collars and hex keys.
Choose an option to view item availability.
Choose an option to view item availability.
Choose an option to view item availability.
Choose an option to view item availability.
