13 different sizes of hole saws for wood, PVC, non-ferrous metals, and aluminum in a transport case. Universally applicable for wood, PVC, non-ferrous metals, and aluminum. 13 common sizes (16/19/22/25/32/35/37/44/51/57/64/68/76 mm) for materials up to 38 mm thick. The two adapters are equipped with centering drills and have a hexagonal shank for quick-change drill chucks. With ejector spring for easy removal of the cutout from the hole saw.