My coffee maker recently blogged a few months ago. I tried to open it up myself, but the security screw was in my way. Not wanting to pay for Jura Espresso repairs and shipping, I looked for months in stores and online to find a screwdriver that would work with it, but eventually gave up. Recently, I found someone on a website talking about this screwdriver in this set that can unscrew it, so I went to the link and got the set. I finally got the screw driver and went through the tool box. one of the screwdrivers in the set actually worked. It was called the n-usa-o. I unscrewed the security screw and fixed that clog making the coffee maker unusable. If you would like to order yourself a set if your Jura is broke or if your high end coffee maker breaks in the future, you will not be sorry with the screw driver set.