This is a cutting assistant is an angle control to your cuts of your EVA foam.
this cuts have 3 setting.
:90 degree or straight cuts
:60 degree or angled cuts
90 degree cuts
These are the type of cuts you need for a straight and clean join between two 90 degree EVA foam.
60 degree Cuts
for those cuts whose need to be bent in a 60 degree fashion.
45 degree cuts
For those you need bent in a 90 degree bend
2 concave parts to put your finger to guide the knife along a path
stripped underside so its smoother to move (print with raft)
(I'm overdoing this detail summary? Ill stop)