It only took me 30 minutes to completely overhaul the spark plugs on my beloved Kawasaki engine! Worth the money invested. I've wanted to buy such a tool for a very long time, but I was afraid because of the high cost in the store, it costs about $200 compared to this one for only tens of dollars! High quality at a very good price. Trust me, it's worth having one in our toolbox in case the rainy days come. Especially this tool has a suitable length, suitable for working in narrow spaces. I would buy this tool if it came sooner so I could fix the spark plugs in one of my best friends car.