This high-quality hardware is designed to keep your roof rack in place and prevent any unwanted movement. The cap is compatible with a variety of roof rack systems and comes with a lock for added security. Constructed with durable materials, this performance part is built to last and withstand the elements. The Rhino-Rack Vortex Secure Core Locking End Cap - Single is perfect for anyone looking to upgrade their roof rack and keep their belongings safe and secure.