2.4.2 Nut Drivers A nut driver is a special tool with a 6-point socket at the tip of a screwdriver-type handle, Figure 2-25. Nut drivers are useful for removing and replacing small hex head (6-sided) screws and nuts. Nut drivers are available in sizes ranging from 3⁄16″ to ⅝″. Handles are usually color-coded for quick selection of size. Hollow shaft nut drivers are considered best for general use. Goodheart-Willcox Publisher Figure 2-23. In one type of screw-holding screwdriver, spring-steel fingers grip the head of the screw and hold it firmly against the blade. Vaco Products Figure 2-24. Besides standard and Phillips screw- head patterns, there are a number of special patterns like those shown here. The Torx® pattern is widely used in the automotive industry, for example. Goodheart-Willcox Publisher Figure 2-25. Nut drivers, like these hollow-shaft types, usually have handles that are color-coded for easy identification. Chapter 2 Hand Tools 25 Copyright Goodheart-Willcox Co., Inc.