Using the DeWalt DWA54580 rebar cutter is straightforward. First, make sure to securely attach the cutter to your compatible power tool using the SDS Plus shank. When you're ready to cut through rebar, switch to hammer mode if needed. The optimized carbide tip will do most of the work, allowing you to drill through with ease. As for maintenance, after each use, clean the cutter to remove any debris. Check the carbide tip regularly for wear and tear. If it shows significant damage, it's time to replace the cutter. Always store the cutter in a dry place to prevent rusting. Also, remember to follow all safety instructions provided by the tool manufacturer when operating the rebar cutter.