Great idea by DeWalt. However, they are cumbersome to put on and the angles needed tweeking to get them straight. These will give you a false sense of security, though. I say that because I bought finger jointed paintable pine mouldings at a big-box store and all the dimensions were not perfectly the same from board to board (different lots and manufacturers? Dunno). But based on my assumptions, I was relying on the stops and not checking closely enough and ended up with troubles.