Using the TN-125M manual pipe notcher is easy. First, select the appropriate pipe size among 0.75", 1", or 1.25". Place the pipe in the notcher and make sure it's properly positioned. Then, use the manual power to notch the pipe at a 90° angle. When using it, always wear safety goggles to protect your eyes from any flying debris. Don't try to notch pipes larger than the specified sizes as it may damage the machine. For maintenance, keep the machine clean after each use. Wipe off any dirt or metal shavings. You can also apply a light coat of oil to the moving parts to prevent rust. If you encounter any problems, refer to the 1-year parts warranty for support.