Dottie Self-drilling hex washer head screw measuring 1-Inch x size 10, helps to drill hole and tap threads in one operation. This self piercing/self-tapping screw in zinc-plated finish, features steel construction. Screw taps its own mating threads when driven into preformed holes in metal. Drilling operation in this screw removes metal and is suitable to use with heavier gauge metals.

Special Features:Features: Self Drilling, Invincibox Up to 2 Inch, Tuff Pack