Odd Screw Lengths
At a minimum, a\xa0screw\xa0drive is a set of shaped cavities and protrusions on the screw head that allows\xa0torque\xa0to be applied to it.[1][2]\xa0Usually, it also involves a mating\xa0tool, such as a\xa0screwdriver, that is used to turn it. Some of the less-common drives are classified as being "tamper-resistant".