Bosch 2609390588 - 3/8 inch Hole Saw Arbor is a hexagonal adapter that connects hole saw to the power tool with a mandrel. It is compatible with all corded and cordless drill drivers. It saws hole from 14-30 mm that can be mounted on any 13mm or above drill chuck. Bosch Hole Saw Arbor is good to use with metal, PVC, aluminium and wood. It is made up of HSS bi-metal hole saw for standard adapters. It has 8% cobalt alloy for extreme resilience. 3/8 inch Hole Saw Arbor has long lifetime Vario tooth strip for a fast and precise cut and speed. It has an advanced design that allows the user to change any size or type of hole saw in less time. It offers easy plug removal and is compatible with all major brands.