Review on 5pcs Precision MacBook Repair Tool Kit: P5 Pentalobe Screwdriver, T5 Torx, PH000 Phillips Screwdriver, Ultra-Thin Steel and Nylon Spudgers - for MacBook Pro & MacBook Air with Retina Display by Shane Minter

Check the information on Apple's website carefully or look online for a few tutorial videos when replacing the hard drive want to replace in your Macbook. You need to figure out what size Torx screwdriver you need before beginning the surgery. I didn't check thoroughly enough. If you wish to use this kit to install a new hard drive, you will need to remove four torx screws from the existing hard drive. They are used as pins to secure the drive in its intended area before attaching it to the cable. These four screws require a T6 screwdriver, not a T5, and if you use a T5 you run the risk of tearing them off. Phillips can open the back, pentalobe worked on my battery but torx was useless. You will not be able to start the drive unless all four pins are properly seated. Macsales has an excellent range of process videos for just about every model and size of Mac laptop from 2008 to today. They are worth a look before ordering instruments.