Blue Ruspert Star Drive Flat Head Masonry Screws, 100 Pieces - 3/16" x 3-1/4" Self-Tapping Concrete Masonry Screws, Fasteners for Interior & Exterior Construction, Repair

TorqueMaster masonry screws are designed with heavy duty masonry anchoring applications in mind. Manufactured with hardened alloy steel for maximum strength and coated with a Blue Ruspert coating for superior corrosion resistance, TorqueMaster masonry screws are suitable for both interior and exterior use, as well as use in ACQ treated lumber. The star drive eliminates cam-out, while serrated threads help cut through the pre-drilled hole for a strong hold. The appropriate driver and drill bit are included in each box of TorqueMaster screws.

• AVOID CAM-OUT: The star-drive design maximizes torque & reduces cam-out, protects the fastener & bit
• FLAT HEAD: Featuring countersinking nibs, these masonry screws have flush installation in the lumber that are great for interior or exterior use.
• SERRATED THREADS: Serrated threads cut into the walls of the pre-drilled hole for easy installation and a strong hold every time.
• BLUE RUSPERT COATING: Suitable for exterior and treated lumber applications, the blue ruspert coating provides superior rust resistance.
• DRIVER & DRILL BIT INCLUDED: The proper driver bit and carbide-tipped masonry drill bit are included in each box of TorqueMaster screws.