Screwdrivers (Auto Repair)

There are two basic types of screwdrivers: standard, or slot, screwdrivers (the most common type) and Phillips screwdrivers. The difference between a standard screwdriver and a Phillips screwdriver is the shape of the head, as shown in Figures 2-1 and 2-2. You use Phillips screwdrivers with Phillips screws, and standard screwdrivers with — you guessed it — standard screws.
Using a screwdriver of the wrong type or size can damage the screw, the screwdriver, and even you if your hand slips while you’re struggling to use the tool. Always use a screwdriver with a tip that’s the same width and type as the head of the screw you’re working on.
Because you usually can’t use a standard screwdriver on a Phillips screw or vice versa (except for some Phillips/slot head screws that can be tightened or loosened by a standard blade type or Phillips head screwdriver), and because your car is fitted with both types of screws in a variety of sizes, you need several of each type (not just for your vehicle, but for almost anything around the house).
Shafts vary in length too, which is useful because a longer shaft provides greater access to “buried” screws, while a shorter shaft gets into tight places more easily. Handles also vary. It’s important to have large, easy-to-grip handles to help you loosen tight screws.
You can get all the screwdrivers you need for relatively little money. Look for sales on plastic- or rubber-handled screwdrivers in sets of varying sizes.

Figure 2-1:
Standard screws and screwdrivers.

Figure 2-2: Phillips screws and screwdrivers.