1-12 x 3 1/2 Socket Cap Screw Alloy

#7 Heavy Duty Drill Bit - Stubby Length

5/8-11 x 4 1/4 Socket Cap Screw Alloy

They can carry twice the weight of a standard wing anchor but only require a ½ inch hole

#55 Heavy Duty Drill Bit - Stubby Length

1/4 x 4 Mushroom Spike Zinc Plated (100) Flat Split Drive Anchors Zinc Plated - Clearance 1-12 x 3 1/2 Socket1 4 x 4 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