Particle by Symbiote 054020 Rope Lock Tie Down with 6' of 550 Paracord and Snap Hooks - Pair by Progrip. $10.44. This patented device uses specially designed ribs to lock the rope inside the wheel hub and is easily tightened with one hand. The ratchet feature on the wheel set lock the rope and prevents unwanted tension loss. A simple thumb operated release trigger disengages the ratchet lock to unwind, when you desire.