Quick, precise of a damaged drain line: trim the damaged line slightly beyond the damaged area, then fit the included drain plug and washer for a secure seal. Comprehensive kit for multiple lines: suitable for repairing drain plug lines on the tank, transmission (speedchanging box), and differential. Durable, longlife construction: made from quality materials designed for daily workshop use. Broad compatibility: fits the most drain lines used in cars and light commercial vehicles. Includes drain plug and washer: ready for immediate installation. Use scenario 1: during a routine service on a passenger car, a damaged tank drain line by trimming to the correct size and installing the included drain plug and washer to restore a leak seal. Use scenario 2: on a light commercial vehicle, perform a transmission drain line during servicing, using the kit to ensure a reliable seal when refilling. Use scenario 3: at differential maintenance, or the differential drain plug line with the kit to prevent leaks and compatibility issues.