1Adjusts to the thickness
The screws open from 0 to 70 mm to grip the boards, and the mechanism is simple to tighten and release.
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Corners held at a true 90°-12%CODEcapitalone12Harfington 90° corner clamps, set of 2
Two corner clamps that hold boards at a right angle while you join picture frames, drawers or cabinets. Turn the screw handles to match the thickness of each board.
12%$38.3
Price with code · Harfington · as of 2026-10-09Code capitalone12 · 12% off
2Even with mismatched boards
Each side has its own screw, so two boards of different thickness can still be held square.
3Holds while the glue sets
Use them to clamp joints, hold position after gluing, and check that corners are square.
Key specs
- Pieces
- 2 clamps
- Angle
- 90°
- Clamping range
- 0–70 mm
- Size
- 290 × 215 mm
- Material
- Aluminum alloy
Good pick if
- You build your own frames, drawers or boxes
- You make right-angle joints on your own
Think twice if
- You need to clamp stock thicker than 70 mm
FAQ
Is there a promo code?
Yes. Enter capitalone12 at Harfington checkout when buying the Harfington 90° corner clamps, set of 2 for 12% off.
Does it work on materials other than wood?
The page says it works with materials such as wood, metal and plastic.
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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