Shorpioen 20-Pack 1/4 x 3-1/4" Phillips Flat Concrete Screw Blue Perma Seal No Drill Bit BC-1452CNPF

An externally threaded, hardened screw with a double lead, consisting of alternating raised and lowered threads with notches cut into the raised threads, and a diamond-shaped, nail-type point. Cuts its own threads and when used in concrete, block or brick. Eliminates the need for an anchor when used in light or medium-duty applications. When used in concrete, it can be removed and re-driven into the same hole. Special carbide bits are recommended for driving concrete screws into masonry. Some applications include anchoring the following to masonry: electrical junction boxes, wooden beams, plywood, exterior insulation, metal flashing, thresholds. The Ruspert finish is a ceramic coating that also allows these fasteners to be used in pressure-treated lumber.

• DRILL BIT NOT INCLUDED: Requires separate purchase of correct size drill bit for proper installation (3/16" bit for 1/4" screws) - Need a high-quality Drill Bit? We recommend our premium options: ASIN B0D94YN6SC or B0D94Y3YKH
• PROFESSIONAL GRADE: High-quality concrete fasteners for reliable performance in demanding applications
• COLOR OPTIONS: Available in white, blue, ivory, or bronze finishes to match or contrast with installation surfaces
• VERSATILE USE: Perfect for attaching fixtures, framing, electrical boxes, and signage to concrete and masonry
• HEAD OPTIONS: Choose between hex flanged head for maximum holding force or flat head for flush mounting