The Jakar mount cutter can cut mountboard, finnboard and foamboard at a 45° angle and 90° angle.
It should always be used in connection with the JAKAR aluminium ruler (TK30078).
The cutting should be done from the rear surface.
In order to achieve a 45° angle, ruler is to be placed on the outside of the aperture, for the 90° on the inside of the aperture.