This looks a bit like an extra-thick L-ruler, but it’s purpose is different. There are no markings, so you can’t measure anything with it. Instead, its only job is to verify, or create for you, a very accurate 90-degree angle. For example, if you want to check that the blade of a table saw is exactly vertical, you can hold one of these against it and adjust the angle until it’s perfectly in line with both the blade and the table.
Location: Box 3
Have you used this tool? Think my description is all wrong? Have a better example? Comment now with any thoughts you have about this tool!
