Etched scale 65 mm (2.5 inches), dimensions 68 x 68 x 15 mm.
Precision-milled square with mm-scale, made of solid aluminium.
The 15 mm material thickness allows the square to stand securely on its narrow leg, which is an advantage when setting the depth on e.g. circular saws and routing tables.
Useful for case assembly by using the seconday holes for clamping