This is a great set of 3 different sized contour gauges at a very reasonable price! I just did this to cover all the tool bases in a futile effort :)) I don't need them but I KNOW they will come in handy for me. Top brands like Saker cost 3 or 4 times that. I would guess that they have more "teeth" to match more closely. This middle shot shows the profile of the saw fence and you can see how it took on this shape. They hold the imprinted profile very well. I think they are worth adding to your tool racks and they will have you covered! They arrived on prime and on time as described. I'm happy.