Using this ratchet style pipe and tubing cutter is easy. First, select the tubing you want to cut, making sure its diameter is between 5/16 and 11/8 inches. Place the cutter around the tubing and start turning the ratchet. The self - feeding action will automatically cut through the tubing. Remember, this cutter is designed for tight spaces, so you can use it in areas where other cutters might not fit. When using it, keep a firm grip on the nylon/fibreglass handle for better control. After use, clean the cutter to remove any debris. Check the cutting wheel regularly, and if it gets dull, you can replace it with the spare one stored in the handle. Store the cutter in a dry place to prevent rusting. Always wear appropriate safety gear like gloves when using this cutter.