Corner Clamps

Corner clamps align and clamp two boards at right angles for picture frames, drawers and box construction.  Some models automatically square the joint as you tighten them.

What are corner clamps used for?
Corner clamps are designed to hold two pieces of material at a fixed angle — usually 90° — making them essential for assembling frames, cabinets, boxes, and picture frames with precise corners.

Are corner clamps only available in 90° versions?
No. While 90° clamps are the most common, adjustable corner clamps exist that can hold materials at other angles, such as 45° for mitred joints, giving more versatility for different projects.

What’s the best way to ensure a tight, square joint with corner clamps?
Check that both pieces of material are cut accurately before clamping. Tighten the clamp evenly and confirm squareness with a square or measuring tool before gluing, screwing, or welding the joint.