Best Carpentry Gadgets
These must have carpentry gadgets are a great addition to the power tools I use on a regular basis. There are a few other tools and gadgets I use when building cabinets and built-ins that help me get professional results.
Square Check
Square check for tape measure from Rockler hold your tape measure in place while you measure diagonally from corner to corner to make sure your cabinet is square before attaching the back.

90° Corner Clamps
I have used several versions of assembly squares and found my preferred combination for building cabinets. I place BORA 90-Degree Corner Clamps on the assembly table (or floor if it’s a really large cabinet) to hold the cabinet parts together squarely, and keep them upright.

Then I place Bessey Corner Clamps at the top of each joint while I fasten them.

Square
Squares come in different sizes and prices. Some inexpensive squares can be dead on but it is important to note that not all squares are square – check yours to make sure it is square before using it.
Or you can buy one that is guaranteed to be square. This Woodpecker 12″ precision square costs about $100. It’s an investment for sure. It’s accurate to .001-inch, guaranteed for life.

Great info on some very useful tools. Thank you for the info!
was looking at those HF corner clamps. do you still find them useful? I’d be looking to use them while pocket-holing shelves and cabinet bases
Those EZ Mark cords are really cool but the prices on everything have really gone up since you posted this!