I bought this tool out of necessity. I'm playing with a car and am involved in the fine tuning stage. At the moment I am tuning a custom built carburetor I had built for my engine. After playing around with a different name brand carb that was not working out for my application including doing some frequent jet changes - and getting tired of ruining the jets with a flat blade screwdriver. I was not going to repeat the problems I caused with my new carb so when I purchased the jet assortment I bought the tool. It's the right tool for the job. No more messed up jets.