Torque Master Flat Head Concrete Screws, 1/4″ X 4″, 100 Pieces (T-30 Star Bit)
Blue Ruspert Coating: Provides excellent rust and corrosion resistance, making them suitable for both interior and exterior use, and compatible with ACQ treated lumber. Serrated Threads: Designed to cut into the pre-drilled hole, ensuring a strong, secure hold in concrete and masonry.