Using the iTOOLco GP124 Gear Punch Knockout Tool Kit is quite straightforward. First, pick the right punch and die according to the conduit size you need. They're clearly marked, so it's easy to find the correct one. Then, attach the Gear Punch™ tool to your corded or cordless drill. No special add - ons are required, so any drill will work. Once it's attached, you're ready to cut through mild or stainless steel. Remember to align the punch and die using the Center Point™ marks for a perfect cut, no matter which direction you're cutting from. When it comes to maintenance, keep the tool clean after each use. Wipe off any metal shavings or debris. The draw studs come with a lifetime warranty, but it's still a good idea to check them regularly for any signs of wear. The step bits are Helical TiAn coated, which means they're durable, but try not to over - stress them. If you notice any issues with the tool, don't worry, as it comes with a 6 - year warranty. Just follow these simple steps, and your iTOOLco GP124 will serve you well for a long time.