I saw some instructions from iFixit which I found very successful and I wanted to upgrade my MacBook I was looking for a suitable tool. After some searching, I found just this and thought ok that are surely use valent tool. Unfortunately I made precise opposite. after the sixth screw broke off a part of the bits used. For the price more than inappropriate. The rest makes a very cheap impression. I then used my cheap DIY tool without problems. Very sad but I can only advise them to buy the.