Better than calipers!

Yes, they do work good, but remember they are a little bit oversized.

Another good way is to drill a hole in a piece if wood the size you want and then cut it in half.
If you want a press fit then turn until it’s a press fit.

-- Gary, East TX -- The longest journey begins with a single step.

That’s real clever. Nice to know there is an option out there that doesn’t include buying a new tool to get exact measurements (those are so rare).

~DB

-- Happy Ripping!!!

Thanks, Gary!
True, wrenches are a bit oversized. For this project I roughed up the tenons with some 36-grit sandpaper because I anticipated a lot of stress on the joints My trial fittings polished the tenons and I was concerned about penetration of the glue. I’m using polyurethane glue on this, my first time with it. Seems kind of weird, wetting the joints first with water!
Making a gauge out of wood is a great idea also! Thx!.

-- If stradivarius was alive today, he'd be using Gorilla Glue.

~DB,

An option for not buying a new tool. ARRRRGGHH!! I thought the moderators did a better job of screening for obscenities on this website. ;)

Whit

-- Even if to be nothing more than a bad example, everything serves a purpose.

Norm Abrams has shown this on his show also. They are slightly larger than the measurement but this works well

-- making sawdust....