What is a difference between Phillips drives and Frearson drives?

The correct distinction between Phillips drives and Frearson drives lies in the tapering of the drive slots. Frearson drives have slots that are less tapered than those found in Phillips drives. This design difference allows for greater engagement with the screwdriver and can provide improved torque transfer, making it easier to tighten or loosen fasteners.

While Phillips drives were designed to allow some self-centering of the screwdriver, the more pronounced taper can lead to reduced torque transfer in certain situations. In contrast, the design of Frearson drives aims to facilitate a better fit with the driver, which is especially beneficial in applications requiring more precise control or when using powered tools.

The other options do not accurately reflect the characteristics of these two types of drives. Phillips drives are not specifically associated with larger fasteners, and the statement claiming no difference between the two is inaccurate, as each design serves distinct purposes in fastening applications.