Vantech Self-Contained Single Ratchet Tie-Down For H2.1 Series Model RTDH2KVantech Self Contained Single Ratchet Tie Down For H2. 1 Series Model RTDH2K (SOLD INDIVIDUALLY) The Vantech Ratchet Tie Down kit works are designed to work for each Vantech rack system. The straps are made from Heavy Duty Nylon. The adaptor allows for an easy install utilizing track on the side of the cargo rails and can be positioned anywhere on the track.