To open my MacBook, I needed a special, fine screwdriver. Before I bought this from Philips, I prefer to put this 45-parts-box the same for a comparable price. The delivery was fast. The bits are arranged neatly in a sturdy box. The stability and metalworking I can not judge yet. For changing the RAM on MacBook I got along with this. Thus, I have a lot of my money get because the other bits are sure eventually also be used.