Easy circle ruler

hi, this is a easy circle ruler. its easy to print and useful tool for make a practical circle on any material. its make a circle 1cm to 50cm radius also it can be draw half of a centimeters ( for example 20.5cm ,35.5cm ,41.5cm etc. )

using instructions

* first you must fix the ruler using fixing pin holes.
* if your diameter value is integer numbers for example 2,4,6,8,10,12... you must use first fix hole and draw holes.
* if your diameter number odd numbers for example 1,3,5,7,9,11,13... use bottom fix point and draw holes, this holes marked as a 0,50
* if your circles diameter decimals nubers for example 10.5,15.5,20.5.38.5 etc... please use middle line on the ruler as marked 0,25.

im sorry for the my poor english and photos. if any question about using ruler please message or comment.