When a Phillips is not a Phillips Plus So Much More!

Step 85: E-Torx® (External)

An external E-Torx® version exists, where the screw head has the shape of a Torx® screwdriver bit, and a special Torx® socket is used to drive it. These are found primarily on automobile engines. These drive screws and bits are available in both 5 and 6 lobe designs. E-Torx® head sizes are described using the capital letter "E", followed by a number. A smaller number corresponds to a smaller point-to-point dimension of the screw head. Excellent sizing charts available on the Wiha Tools website.