1/4 Heavy Duty Drill Bit - Stubby Length

1 3/4-5 x 20 Socket Cap Screw Alloy

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

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

7/8-9 x 4 Hex Cap Screw SS 18-8 (A2)

3/16 x 1 Mushroom Spike Zinc Plated (100) Jobber Drill Bits - Wire Gauge 1/4 Heavy Duty Drill Bit3 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