I have some small stumps in my yard that I can't mow and then I have to go back and weed them because the mower has them so I can mow right over it Works like a charm, shredded stumps in no time I have to admit it was a little scary to use at first but after a few minutes it was a breeze The discs are very sharp and clog up so you need a wire brush to remove the wood from them.They seem to be durable and you get 4 discs so that's a huge plus.I've tried them with every type of woodworking but I'm sure s They will be ok since they went right through the stump.