Product Page: https://www.woodpeck.com/dado-nut-saw...

If you’ve tried to put a full 3/4" dado stack on your SawStop Table Saw, you know the problem; there's simply not enough shaft to install both the arbor washer and the arbor nut. To get the best cutting performance, the washer is pretty much a necessity. Leaving it off can distort the blade and compromise cut quality. The engineers at Woodpeckers have developed a clever solution; a combination arbor nut and washer that doesn’t take up any more room than the original nut by itself. We call it the Dado Nut.