A device for locking to a vehicle seat having a child car seat mounting system includes a pair of pawl assemblies with hooks that connect to the loops of a child car seat mounting system. The hooks are spring-actuated pawls. The device includes two indicator windows that can respectively display the open or locked status of the first hook and the second hook, which move in unison and also lock and open in unison. The indicator windows separately confirms the condition of both of the hooks. A button is interconnected to both of the hooks to simultaneously control opening and locking thereof. The button is also interconnected to a ratchet to permit simultaneous relocation of the hooks for custom adjustment. A child car seat can be mounted to the device to secure the child seat to a vehicle seat that includes a child car seat mounting system.