I have a business that provides low voltage plumbing services. a piece once you need 2-3 nozzles and 3-4 wands ($80-110 investment) instead of 8-12 different nozzle/stem combos ($300-600 investment). wood and drilling. With a larger diameter drill like this you need to move slowly, you also need to make sure all the screws in the bits/shanks are very tight. Otherwise you will get stuck in the tree and/or break the shaft of the bit.