Type of joint – the joints are made of brass 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 paint. UV environmentally friendly coating of the top layer protects the ruler from the effect of thinner.

Compact space of the ruler – the whole surface of the ruler, consisting of 15 parts, can be used for promotional purposes. The joints are recessed. Adjacent wooden parts form compact surface for the smooth print. UV coating enables the wrong print to be washed away easily and replaced with different one.