Using the DeWalt DAH9912PBM is a piece of cake. When you need to change the hole saw or the pilot bit, you don't need any extra tools. Just use one hand to operate the collar that clicks between two positions. First, remove the saw and then the pilot bit following the Rapid-Load® Quick Change process. Make sure the no-seize collar stays engaged during drilling to avoid the hole saw getting locked onto the arbor. As for maintenance, keep it clean after each use. Wipe off any dust or debris. And when not in use, store it in a dry place. Also, check for any signs of wear and tear regularly. If you notice anything wrong, it might be time to replace it or get it serviced. Remember, this arbor is compatible with all threaded hole saws without an adapter, but only for the diameter ranges listed on the package. So, always double - check the diameter before using a new hole saw.
