The Spike® anchor is formed with an "s" shaped configuration at the working end of the anchor to create an expansion mechanism

1/2 x 2 9/16 (1/4 Drive) Magnetic Nut Setter

1-12 x 2 Socket Cap Screw Alloy

1 5/16 x 6 Reduced Shank Drill Bit (1/2 Shank)

1/16 Heavy Duty Jobber Drill Bit

9/16-12 x 4 Hex Cap Screw SS 316 (A4) Flat Mushroom Toggle Bolts Zinc Plated The Spike® anchor is formed9 16 12 x 4 Hex Cap Screw SS 316 (A4) . 316 series stainless steel differs from 18 8 by its molybdenum content (2 3%) and a higher nickel content (10 14%). 316 stainless steel has greater corrosion resistance than 18 8 as well as superior strength at high temperatures.