Using the Greenlee 925 - 022 is straightforward. First, select the appropriate cutter size for your project. You can change the cutter size without using any tools. When starting to drill, the split - point pilot drill will prevent the saw from 'walking', so just place it where you want the hole and start drilling. The precisely - ground teeth will cut smooth, burr - free holes easily. After drilling, the spring - loaded slug ejector will save you time by quickly removing the slug. For maintenance, keep the saw clean after each use. Wipe off any debris or dust. Store it in a dry place to prevent rusting. Also, since it has high durability, it will last 10 times longer than standard hole saws, but still handle it with care to avoid any unnecessary damage.