This square from Ulmia satisfies all the requirements of an optimum measuring tool. The stock is made of fine precious wood with hand recesses and is protected by two brass edges with dovetail joint. The hardened steel blade is permanently fixed by four rivets bound to brass frames inlaid on both sides of the handle. Accuracy 0.01 mm per 100 mm.
- Tongue length 250 mm
- Stock length 150 mm