"Fleaz can be used for many places on a tarp.  They can be on your D Ring on your tarp, a prussic on your continuous ridgeline, on your tie outs, or even on your stakes.  Each one weighs an unbelievable .89 grams each, yes! less than a gram."
 
The above wording is straight from Dutch, and his team.
 
Fleaz are mirco tensioning devices for smaller diameter cord. Sold individually.