Arbors with SDS+ drive shank are designed for machines with quick chucks.Simplifies the change of arbor.Arbor ending with SD30 is designed for small holesaw Ø14-30mm.Arbor ending with SD152 is designed for big holesaws Ø32-152mm.HSS Pilot drill 3834-DRL is included in all arbors, to be used for Metal & Wood applications.Arbors can be used with Carbide holesaws but we recommend to use the carbide tipped pilot drill, 3834-DRL-CT, for cutting abrasive materials.Arbors can be used for Multi-Construction holesaws but it requires changing the drill to 3834-DRL-L.Arbors are packed in cardboard boxes