This universal marking gauge can mark from inside or outside corners and along straight edges. It can also be used as a square or a 45 degree marking aid.
It is easy to use, the ruler is held in with strong magnets and the top has rebated edges where the ruler comes through to make adjustment easy.
Available from my facebook store [ Ссылка ]
In the US you can get a ruler that is dual sided, both metric and imperial here [ Ссылка ]
