Blacksmith gauge made of thick, heat-resistant stainless steel with engraved inscriptions. Gauge has a peripheral cut-out rectangular or square with a width of 6, 8, 10, 12, 14, 16, 18, 20, 22, 24, 25, 30, 35 and 40 [mm] and a notch concave with a radius R5, r6, r7, r8, r9, r10, r11 and r12 [mm]. In the middle of the gauge there are three square holes 10x10, 12x12, 14x14 [mm] and four round holes with diameters of Ø 10, Ø12, Ø14, Ø16 [mm], the hole at the end of the handle is used for hanging it on the wall. Engraved on the handle gauge is also a small ruler.