Flanged Combination Head Screws: Phillips + Slotted Drive Guide
Flanged combination head screws pair a broad integral bearing surface with a drive that can accept more than one common tool style, often Phillips and slotted. They are practical in serviceable equipment where tool availability varies and a wider head bearing area is useful.
Allen vs Torx vs Phillips vs Slotted: Which Screw Drive Is Best?
The drive is the interface between a screw and the tool used to install it. Allen, Torx, Phillips and slotted drives can all be found on metric machine screws, but they behave.