Squares are ....square

[Mike Walsh]

I have 3 Starrett squares that belonged to my Dad, all are the steel rule versions and at least 50 yrs old. They're all "dead square" no matter which way I check them - only issue is the rulers are hard to read. About 3 years ago I got a satin finish rule which is much easier to read - I can swap it into any of the 3 heads and no difference from the original rules. I don't own any WP measuring tools, but I'd highly recommend investing in the quality of the Starrett product

[Brian Holcombe]

Checking precision tools for accuracy can be done in various ways, I saw Chris Vesper has a pretty cool rig setup
for checking his squares with an indicator.

If I were serious about squareness I would use a granite master square.

[Edwin Santos]

Checking precision tools for accuracy can be done in various ways, I saw Chris Vesper has a pretty cool rig setup
for checking his squares with an indicator.

If I were serious about squareness I would use a granite master square.

Adjusting a combo square is surprisingly simple. All it takes is a small thin file. I've seen a video somewhere online by Robert Lang where he demonstrates how to do it. You can sneak up on the adjustment using your checking method of choice until you get it dialed in.