You can cut the most accurate joinery in the world, but if your glue-up is not done correctly, you've missed the boat. The secret is clamping cauls, sized and applied correctly so that you get the right amount of glue in the right places with the correct amount of clamping pressure. This Fundamentals shows how to make and use cauls for edge-gluing flat tabletops, applying edge-banding, bringing bookshelves all the way into their dadoes, clamping dovetail joints, and ensuring tight mortise-and-tenon joints.

From Fine Woodworking #218