Using your Klein 24-Inch Steel-Handle All-Purpose Bolt Cutter is a straightforward process. First, identify the material you need to cut and ensure it falls within the cutter's capacity. For 90-degree cuts, use the flat ends of the handle grips for better leverage. When cutting, place the material in the center of the jaws and apply steady pressure until the cut is complete. As for maintenance, after each use, wipe the cutter clean to remove any debris or metal shavings. You can also apply a light coat of oil to the jaws to prevent rusting. Check the lockplate regularly to make sure the jaw bolts are not loose. If you need to replace the blade, the 63824 replacement blade is the one to use. Always remember to store the cutter in a dry place when not in use. And be careful not to exceed the cutting capacity for different materials to avoid damaging the cutter.