Using the DeWalt DWA54780 rebar cutter is a breeze. First, make sure your drill supports SDS Plus shanks. Insert the rebar cutter into the drill. If you need to drill through hard rebar, you can switch to the hammer mode thanks to its durable head design. When you want to change to a carbide bit, the SDS Plus shank allows you to do it quickly. As for maintenance, after each use, clean the cutter with a brush to remove any debris. Store it in a dry place to prevent rust. Also, check the carbide tip regularly. If it shows signs of excessive wear, it might be time to replace the cutter. Always follow the safety instructions provided by DeWalt to ensure a safe and efficient working experience.