Hillman Fasteners 372164, 25 Pack, 3/8" x 4", Zinc, Wedge Bolt, High Strength Anchor For Concrete, Brick & Block, Zinc Plated For Non-Corrosive Environments, Use 3/8" Wedge Bit, 3/8" ANSI Bit Can Be Used, Apply 15% Load Reduction Factor, Minimum Embedment 1-1/2".