Using this Draper Tools crimping tool is easy. First, select the right terminal for your wire size from the included pre - insulated terminals. Then, place the wire and terminal in the appropriate channel of the tool according to the wire's cross - sectional area (red for 0.5 - 1.00mm², blue for 1.5 - 2.5mm², and yellow for 4.0 - 6.0mm²). Squeeze the tool until the ratchet releases, ensuring a secure crimp. When it comes to maintenance, keep the tool clean and dry. After use, wipe it down to remove any debris. You can also apply a light coat of oil to the moving parts occasionally to keep them working smoothly. As for safety, always wear appropriate eye protection when using the tool. Don't try to crimp materials that are larger than the specified wire sizes, as it could damage the tool or cause an unsafe crimp.