Tarp Clip
thingiverse
It's a simple tarp clip. All you need to add is a wing nut and bolt. Update: Print version two, this one is weaksauce Version 2: http://www.thingiverse.com/thing:1247 Instructions Print on 3D printer. Drill a rope/bungee size hole (at least 0.25") in the thick end. Drill a 0.25" hole through both jaws near the teeth. Place a bolt and wing nut through the hole near the teeth to tighten. I don't have access yet to a makerbot or similar 3d printer, so please let me know how this looks printed so I can adjust it as necessary.
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