Safely: Keeps your dog/cat in place even when breaking suddenly. This helps drive safely and reduces the risk of injuries for pets. Freedom: The lock can move along the seat belt so that a pet can sit, stand, or lie down. It provides freedom of movement safety and comfort. Easy To Use: Very easy to install on the belt. It is easy to assemble and disassemble. You can attach directly to the harness of the dog/cat, you can attach to a leash if you carte for a larger space. The clasp is very solid, it will not detach itself. Fits Car belts，and can attach to the ring of various pet collars and harnesses. Material: Made of Aluminium alloy, and is lightweight, durable and has good finishes. Portable and easy to be stored.