The Hillman Slotted Hex Head Sheet Metal Screws, or tapping screws, are highly versatile. Though these sheet metal screws are designed to attach metal to metal, they're also used to attach metal to wood, fiberglass, and plastic. Great for general repair around the house, the sharp threads of these hex washer head sheet metal screws draw materials together and ensure a secure hold. Great for general repair around the house Hex head sheet metal screws feature sharp threads that ensure secure hold Sheet metal screws are fully threaded with sharp point Pre-drilled hole required for these screws Hex washer head sheet metal screws measure #8 diameter x 3/4" length Designed for joining metal objects, and attaching metal to wood, fiberglass and plastic Zinc finish for moderate corrosion protection Design makes it easy for them to tap into and tighten against whatever they are being installed into