It was necessary to shorten and dissolve 22 glued steps 5 cm thick and 1 m long. The regular disk was crap in the reviews, maybe it is not resourceful, but it did it perfectly and without chips and sawed the burr 22 pieces across and 12 along. I ordered a couple of spare discs worth one and a half in vain. The nozzle for connecting a vacuum cleaner helps a lot, but it does not save from fine dust - it turned out to be dofiga. There is no warranty card.