MB Roba Big is made for larger operation settings. With a 24" sanding drum the big is made for white wood, MDF, lacquer, and sealers. Roba Big is designed as the only belt sander on the market that uses a 24" large drum, this is to allow for lower RPMs keeping edges cleaner, and getting rid of the waves left by smaller drums. Another great feature of the Big is that it keeps the parts cooler keeping a uniform look to all products.