Foam Core Angled Slicer (for v-groove)

This makes cutting a v-groove slice out of foam core easy. Why do this? So that you can bend along the notch to put a nice corner in the foam core without cutting through it.

This object is a small tool made to hold a small section of utility knife blade. There is a photo showing what I mean. It just slots in, you can glue it if it's too loose.

It is shaped and sized so that the inside edge of the tool is the middle of the v-groove. When dragged along a ruler edge on foam core (5 mm or 3/