Clamping up four mitered corners is tricky. You can buy specialty clamps for this, but why not make your own. Here’s how to do it.

  1. Start with a long 1×4, as it’s easier (and safer) to clamp for making the angled cuts than a short piece.
  2. Mark out the blocks, and then drill a 1-in. diameter hole in the center of each one. The hole prevents the blocks from getting glued to your project.
  3. Cut 45-degree angles tangent to the hole, and then cut the blocks free from the long board.
drilling the hole
cutting the angle
clamping the frame

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