I pulled my gauge out and took a picture of the front and back of it (even with misspelled "DIE CLASH GUAGE", always bothers me every time I look at it which is weird as much as I misspell words myself but if I were making something to sell to others I would make sure the spelling was correct). As you can see in the picture there is a center plastic rivet (for lack of a better word) which allows the front and rear to turn independently so you can see where the clash would happen if the dies were rotated






















