Self-Drilling Screw, #9 x 1-1/2 in, Galvanized Steel Hex Head Hex Drive, 429 PK
.Ideal for any project involving light gauge sheet metal, awnings, door and window frames, gutters, sheds. A self-drilling screw, or tek screw, is similar to a sheet metal screw, but it has a drill-shaped point to cut through the substrate to eliminate the need for drilling a pilot hole.