(100pcs) 5/16-18 x 2-1/2" Flat Head Thread Forming & Cutting Screws Trailer Deck Screws, Black Phosphate, Package Contains T40 Star Drivea and 9/32 Drill bit

1. Professional flooring installation screwsSpecifically designed for flooring panels, Type F structure, can be quickly self-tapping cut into the wood surface, to ensure a solid bite, for hardwood, laminate flooring and other efficient installation. | 2. Black Phosphate Anti-corrosion Coating:The surface is treated with black phosphate to enhance corrosion resistance and abrasion resistance, suitable for indoor and mildly humid environments, prolonging the service life of screws. | 3.Extra drill bits includedEquip with the corresponding drill bit model to meet temporary needs. For long-term use, it is recommended to purchase additional bits separately. | 4. Countersunk head design + matching drill bitsFlat Head structure ensures that the screws are flush with the surface of the plate after installation, beautiful and no protrusion; 9/32-inch (7.2mm) drill bit is included, which is easy to pre-drill holes to match and enhance the installation accuracy. | 5. Highlights Refinement: Floor-specific, Torx high-efficiency drive, rust-resistant coating, countersink levelling, matching drill bit in one step.