We made the universal rotation gauge to work on tube/pipe from 1" to 4" o.d. With this design you only get one spot to mark rotation on your tube, but it works on a lot of sizes. The magnets hold strong and still allow fine adjustment. The large tab will hold your rotation gauge at any angle, which is great for measuring the side plane of a tube at a steep angle. This is helpful for marking rotation of bends and even more useful for notching tubes.
-For 1" to 4" tubing
-Allows you to measure and easily transfer rotation angles
-Helps with tube layout and notching
-Neodymium magnets pressed into formed 11ga. steel with a yellow zinc plating
Accuracy is +/- 1 degree. If you happen to step on this and think it got bent, it is easy to check accuracy just like you would with a level. Place on tube, measure and mark 0 degrees, then flip 180 degrees, align to mark and verify it's within 1 degree. If it did get bent, then you can split the difference and tweak the bend at the large tab to get it back into spec.