These angle gauges are made of thin gauge stainless steel. Out of the box, the edges are freshly punched and quite sharp. It sucks when you have to take a new product and modify it so you don't hurt yourself. Aside from the edges, these gauges measure well and the dimensions are clearly marked. Expect to get frustrated with the nut and bolt combo they provide and make your own. If I ever lose them or they get damaged I'll probably spend a few bucks more and buy a better set.
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