7/8-9 x 2 Grade 8 Hex Cap Screw Yellow Zinc Plated

5/8-11 x 14 A307 Grade A Carriage Bolt HDG

7/8-14 x 5 Socket Cap Screw Alloy

1/4 Heavy Duty Drill Bit - Stubby Length

3-4 A563 Grade A Heavy Hex Nut Hot Dipped Galvanized

3/16 x 1 Mushroom Spike Zinc Plated (100) Jobber Drill Bits - Wire Gauge 7/8-9 x 2 Grade 83 16 x 1 Mushroom Spike Zinc Plated (100) . The Spike anchor is a patented, one piece, tamper proof, vibration resistant anchor for use in concrete, block, brick or stone. Several head styles and anchor materials are available. The Spike anchor is formed with an "s" shaped configuration at the working end of the anchor to create an expansion mechanism. Since the anchor is pre expanded, there is no secondary tightening operation required which greatly