This M class screw kit is top notch. I routinely repair and fix laptops, MP3 players, and even some compact desktops and other esoteric electronics. For fixed form devices, they tend to use one of the rated screws included in this kit. I don't know how it happens, but most times when I receive items to repair they inevitably are missing screws.I am very much a complete freak and the idea of item(s) missing screw(s) doesn't sit well with me and I would spend as much time as it took (even orderingSee full review