a. Screwdrivers. There are many different types, shaped ends, and lengths of screwdrivers. The automatic screwdriver (Figure 2-35) is a labor and time saver, especially where great numbers of screws are to be driven. The bits for this tool come in different sizes for slotted and Phillips-head screws and can be changed to fit the different sizes of screws. The automatic screwdriver has a ratchet assembly, which you can adjust to drive or remove screws. You can also lock it in position and use it as an ordinary screwdriver.

b. Phillips Screwdrivers. Phillips screwdrivers are used only for driving Phillips screws (Figure 2-36). Phillips screws have a head with two V-slots, which cross at the center. The tip of the Phillips screwdriver blade is shaped like a pointed or beveled cross to fit into these slots. This type of screwdriver cannot slip out of the slot, therefore preventing damage to expensive finishes.