Zinc-plated for corrosion resistance. Self-tapping PZD pan head screws for multipurpose applications in the home, workshop and garage. Assorted sizes: M3 x 8, M4 x 25, M5 x 20, M3 x 12, M3 x 20, M4 x 20, M4 x 40, M5 x 20, M5 x 50, M6 x 30 and M6 x 50. Handy storage case with compartments.