Apple likes to use annoying pentalobe screws on their devices. While it’s relatively easy to buy a pentalobe screwdriver, why bother, when you probably already have a substitute in your house? Anyone who uses x-acto knives should have a pile of blades with broken off tips. These blades are a quick and dirty surrogate for a pentalobe screwdriver. The tool:
Simply stab the tip of the x-acto knife into the pentalobe screw, and carefully twist:
The screws are so tiny that there isn’t much friction, so even though the knife blade isn’t a perfect fit, I’ve never stripped a screw. The same method works on small Torx and Philips screws. I’ve used this technique on many different devices over the years.