Using your Greenlee cable cutter is a breeze. First, make sure the cable you want to cut is an AC or MC cable and its outside diameter is up to 1'. Place the cable in the cutter. Then, turn the crank a few quick times and give the armor an easy twist. The cutter will slice through the cable in seconds. When you need to make multiple cuts, the quick load clamp system will save you a lot of time and effort. Remember to keep spare blades in the under - handle storage. For maintenance, after each use, clean the cutter to remove any debris. When it's time to replace the blade, use Greenlee Cat #1941 - 1 or #1941 - 5 replacement blades. Also, store the cutter in a dry place to prevent rust and damage.