What is the primary use of Phillips head and slotted head screwdrivers?

The primary use of Phillips head and slotted head screwdrivers is to install and remove screws. These screwdrivers are specifically designed to fit into the respective head shapes of screws, allowing for efficient driving and loosening of screws in various materials such as wood and metal. The Phillips head screwdriver has a cross-shaped tip that provides better grip and torque when turning screws, while the slotted head screwdriver has a flat, straight tip ideal for screws with a single groove. This makes them essential tools in construction, assembly, and repair tasks where screws are often used to fasten items securely.

In contrast, separating wood that is nailed together typically requires different tools such as pry bars or hammers, while tightening hex nuts and bolts would necessitate wrenches rather than screwdrivers. Additionally, driving and pulling nails is most effectively done with a hammer or claw hammer, not a screwdriver. Thus, the specific design and application of Phillips and slotted screwdrivers make installing and removing screws their primary function.