Precise, 300mm long stailess steel stiff centering ruler.

A centre finding or centring rule is unique in having the zero mark in the middle with scales running outwards both left and right. This ruler has a centering scale with 0 in the middle on one edge and a standard scale on the other, as shown on the pictures below.  

The ruler is 25mm wide and 1mm thick, made from tempered stailess steel with chrome anti-glare coating. Manufactured in accordance with I class of EC standard, giving it a high level of precision.