Phillips head is a type of screw that is widely used in different applications, including furniture assembly and DIY projects. It is also known as the crosshead or cross recessed screw. The Phillips head screwdriver has a specific shape that corresponds to the screw's shape, giving it the most efficient fit for turning the screw. It is important to note that the Phillips head screwdriver is different from the slotted screwdriver, which is used for flathead screws. Other synonyms for Phillips head screws are star screws, hex screws, and combo screws. These alternative screws have different shapes but are just as effective and widely used.