Review on 📐 Stainless 30cm SHINWA Carpenters Square by Lynn Cole

I was afraid they would be flimsy and flexible but that's definitely not the case. They are made of 1 mm thick stainless steel and are ideal for use as a parallel cutting guide. I have fairly large hands, but the small size of this L-shaped square makes it easy to hold it in place by simply pressing my thumb against the edge guide of my work surface. It's nicely squared on the outside edges (as confirmed by a vertical line drawn from the ruler) and slightly beveled on the inside edge. I think it's less than 1/10mm at 30mm. For my purposes (bookbinding) that's good enough, and I'll be using the outside margin more often anyway. I also have an 8 x 12 inch L-shaped square, but it's not as legible or well-made as this one.