Hillman #12 x Square -Drive Standard Sheet Metal Screws
Sheet metal screws are highly versatile, used in wood, fiberglass and metal, also called self-tapping screws
A flat head screw contains a countersunk head with a flat top allowing the fastener to sit flush to the surface
A square head, or Robertson drive, is a type of drive with a square shape for a screw, bolt or nut; the square head drive allows for more rotation force
