Hillman No. 10-24 X 1 in. L Phillips Wafer Head Self-Drilling Screws w/Wings 100 pk

This self-drilling screw is used in wood, fiberglass, and metal, and it possess a drill point enabling it to drill its own hole in thin gauge steel. The sharp threads create their own mating thread when drilled into the material. No pre-drilled pilot holes are necessary. * *