Reddit reviews Alvin 10 inches Cutting Edge Triangle 45/90 ACT450-10
We found 1 Reddit comments about Alvin 10 inches Cutting Edge Triangle 45/90 ACT450-10. Here are the top ones, ranked by their Reddit score.
DurableClear acrylicStainless steel10 inches45/90
I use a clear acrylic triangle that has a grid on it, something like this one: https://www.amazon.com/dp/B004MGLQWY/ref=cm_sw_r_cp_awdb_ajVDzbRJKP5AZ
You can probably also find something like that at a arts/craft store or maybe at some office supplies store.