Using the DeWalt DWA54340 SDS Plus Rebar Cutters is quite straightforward. First, make sure your drill is compatible with SDS Plus shanks. Then, insert the rebar cutter into the drill. When you're ready to cut through rebar, you can use the hammer mode thanks to its durable head design. The optimized carbide tip will do most of the work for you, easily slicing through the rebar. As for maintenance, after each use, wipe the cutter clean to remove any debris. Keep it in a dry place to prevent rusting. Also, check the carbide tip regularly for any signs of wear. If it's too worn out, it might be time to replace the cutter. When switching between the carbide bit and the rebar cutter, use the SDS+ shank feature to make the process quick and easy. Always wear appropriate safety gear, like safety glasses, when using this tool.