1Seven common sizes
22, 25, 28, 35, 45, 50 and 65 mm cover most jobs from pipe holes to door-lock bores.
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- 7-piece bi-metal hole saw set, 22–65 mm
Door-lock holes in one pass-12%CODEcapitalone12Harfington 7-piece bi-metal hole saw set, 22–65 mm
Seven bi-metal hole saws with M42 high-speed steel bodies and cobalt-alloy teeth. From 22 to 65 mm, they cut holes for door locks, hinges, pipes and junction boxes in wood and thin metal sheet.
12%$26.35
Price with code · Harfington · as of 2026-10-09Code capitalone12 · 12% off
2Chip slots
Side slots clear chips, prevent clogging and let lubricant reach the teeth for longer life.
3Not for impact drills
Use it in bench drills, drill presses, and corded or cordless hand drills, but not impact drills.
Key specs
- Diameters
- 22 / 25 / 28 / 35 / 45 / 50 / 65 mm
- Shank
- Triangular 10 mm (3/8")
- Body
- M42 high-speed steel
- Teeth
- Cobalt alloy
- For
- Wood, plasterboard, PVC, aluminum, sheet metal
Good pick if
- You install door locks or knobs yourself
- You often drill holes for pipes or cables
Think twice if
- You only own an impact drill
FAQ
Is there a promo code?
Yes. Enter capitalone12 at Harfington checkout when buying the Harfington 7-piece bi-metal hole saw set, 22–65 mm for 12% off.
How powerful does my hand drill need to be?
The page asks for a hand drill above 750 W, with the workpiece clamped firmly and the saw held at 90 degrees.
Can I return it?
The product page offers 30-day returns from delivery. Returns are free within the US; elsewhere you pay the return shipping.
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