Using the DeWalt DAH9938PBM is super easy. First, if you need to change the hole saw or the pilot bit, there's no need to grab extra tools. Just use the collar's click mechanism. Switch it between the two positions to take out or put in the saw and the pilot bit. You can even do this with one hand as the collar stays in place. When you're drilling, the no - seize collar will keep the hole saw from locking onto the arbor. Remember, this arbor works with all threaded hole saws, so you don't need an adapter. As for maintenance, after each use, clean the arbor to remove any debris. Store it in a dry place to prevent rust. Also, check the collar and the parts regularly to make sure everything is in good condition.
