Cabinet and Carcase Squaring Blocks

These little jigs can help you keep a box or cabinet square during construction.

Have you have ever built a box or cabinet? Then you know how difficult it can be to square it up, and keep it that way while the glue dries. These blocks are simple to make and worth their weight in gold!

Step 1

Cut an 8"or 10" square from scrap 3/4" plywood.

Step 2

Use a dado blade or router to cut a 1/2" deep groove 3/4" wide down the center of the block.

Step 3

Cut or rout another groove perpendicular to the first.

Step 4

Use a hole saw or large spade bit to drill a 1-1/2" - 2" hole in the middle of the board, at the intersection of the two grooves.

This hole will aid in alignment and help remove excess glue.


A coat of polyurethane or varnish will help to keep glue from sticking to the blocks during setup.