The bi-metal hole saws leave clean cuts in wood, PVC, non-ferrous metals, and aluminum. The two adapters (for hole saws from 14 to 29 mm and from 32 to 152 mm) are equipped with a universal centering drill. Wood and PVC can be processed up to a thickness of 30 mm, while non-ferrous metals and aluminum can be processed up to 5 mm. The hole saws are compatible with all cordless and corded drills that have a quick-change chuck, thanks to the hexagonal shank. A spring ejector is included for quicker removal of the cut-out from the hole saw, which pushes the material out from the inside.