Anti Theft License Plate Screws: These security screws use a unique tamper-proof design- the top of the Pan Head screw is designed with a hexagonal button head with a thimble in the center. Which cannot be installed or disassembled by an Allen wrench. You need to use the anti-theft screwdriver provided by us to keep your License plate theft proof. | High quality stainless steel license plate screw set: Rustproof Car Number Plate Screws are made from Premium 100% 304 stainless steel, heavy-duty, sturdy and durable, corrosion-resistant, rust-resistant and weather-resistant. | Compatibility: License plate screw kit which we provide include, screws bolts, fastener nuts, screwdriver, caps and washers.1/4"X3/4"(M6*20MM) long screws are suitable for the combined mount of tag plate, frame, and cover of most motorcycles, cars, trailers, and trucks. Self-tapping screws fit most domestic Cars & Trucks License Plate Holes that use Nylon/Plastic Retainer. We provide nylon plug- ins to adjust the size of the bumper pre-drilled holes. | Rattle Proof License Plate:The black license plate rattle proof pad with adhesive backing is used on the back of the metal plate, reduce the vibration noise of the plate, and avoid the car license from scratching the paint of the car. | Cool: This security screw features a unique anti-theft design with a hex button head on top and a thimble in the center. Cannot be installed or removed with common wrench, you need to use our provided anti-theft screwdriver, keep your license plate anti-theft.