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. | After sales: if you have any questions, please let us know in time, we will reply you and solve the problem for you within 24 hours. If you are not satisfied with our product, we will refund you unconditionally or replace it with a new one.