Comes with 1/32 and 1/16 shims so you can stock it anywhere from 3/4" to 1-1/4" The edges at a 1 "Round off a thick piece and it works like a charm, halves the milling time. I first set it to exactly 1" which was a mistake because the wood is too thick from the factory. Once I've cropped the size, it works beautifully and saves me time. After all, time is money. It's a lot heavier than a standard circular cutter, although it's only a 1/4" radius, and I really recommend using it on a router table only a bit larger than my 1-3/4 HP PC router will actually work so I need to buy a bigger router as I will be using it on a daily basis.