Marker slide for ruler

Make it easier to select the distance between the drill holes on the wall when to put up for example a cabinet. You need to print two pieces.
This is made for ruler sold by Biltema. http://www.biltema.se/sv/Verktyg/Matverktyg/Vinkelhake-och-linjal/Aluminiumlinjal-1-m-2000018145/