Robust, simple pieces of hardware that are designed in the USA for small-diameter RidgeLines to hold your Tarp in place. However, outdoor people are finding they have plenty of other uses. The 'Open Hook' version can connect to the split rings fitted to your Tarp. (Warbonnet Tarps have these split rings fitted as standard on all their Tarps.) The 'Closed Loop' version means you can keep your Tarp fitted to the RidgeLine. You can buy Warbonnet's Split Rings from Henge Hammocks' website.
 
NB. NAMA Claws are sold as singles.

The wording below is straight from Scott at NAMA Gear:
"NAMA Claws, the newest hardware accessory for your Tarp, are destined to become your favorite. They replace any hardware or knots that you currently use, and do so in style. They can be used anywhere in your tarp ridgeline or as a tensioner for your stake tie-out lines. NAMA Claws are designed for use with 1.75mm Dyneema line, but will work well with line diameters ranging from 1.2mm up to about 2 mm. They are sold individually."