Velocity Concrete Screw Kit with RedSeal Moisture Barrier – Includes 12 High-Performance Concrete Screws, 1 Drill Bit, and 1 Driver Bit (Flat Head, Size 1/4” x 2 1/4”): Amazon.com: Tools & Home Improvement
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MasTek Self-Drilling Concrete Screws 1/4 x 3" Steel Tungsten Carbide Tip (15PK): Amazon.com: Industrial & Scientific
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Tamper-Resistant Masonry Concrete Screws | Tannerbolt.com
