... making uneven surface. The machine rotates with blunt or flat TCT cutter, or flails, at high speed to chip away the ... quality;Change the drum assembly only in 5 minutes;Sharp TCT cutter is aggressive to remove coatings;Vacuum and water outlet ... details:3, six axis, a drum, special heat treatment; with TCT blades. Easy to replace the drum assembly. 4, More gasoline engine ...