Centering ruler Metal ruler 18cm for marking the belt holes. Triangle.

An absolutely recommended tool for marking belt holes straight and exactly in the middle.

The ruler also offers the option of marking the slot for the buckle.

Manufacturer/Country of Manufacture: Kevin Lee, Republic of China

These are professional tools. The user must have specific knowledge and experience in handling the tool. 
Improper use can result in serious injuries. Keep away from children!