Safer - Do you worry about your child or family accidentally unfastening your seat belt, which could affect safety. Our child proof seat belt guard can bring safety to your family.Easy to use - Simply place the seat buckle on the belt buckle receiver and buckle the belt into the slot. Just use our dedicated key to open it againUniversal for Most Vehicles - Our car seat belt locking cover is compatible with 90% of vehicles models on the market, such as car, truck, and SUV. Please measure the size of the buckle of your car before, as long as your seat belt buckle shape and size are the same to our car seat belt buckle, then can be perfectly matched.Top Quality - The locks for car seat belt are made of premium-quality ABS, comfortable to touch, exquisite craftsmanship, rust-proof, corrosion-resistant and wear-resistant, durable and safe to use.