Type of joint – the joints are made of galvanized black coated steel. They are distinguished by their long life. The steel rivet is hidden. Joints greased with mineral Vaseline together with the hardened spring to ensure a comfortable use of the ruler.

Surface treatment of wooden parts – double-layered water- soluble lacquer. UV environmentally friendly coating of the top layer protects the ruler from the effect of thinner.

Narrowed wooden parts – the narrowed wooden parts make the ruler more comfortable to carry in a pocket. It is also easier to read figures from the scale when measuring. The ruler is extremely flexible especially due to birch wood.