"Stingerz – 3.4 grams each, you won’t notice these on your ridgeline… Same easy connection as the tarp Flyz using 1.75 hollow braid line combined with a mini titanium carabiner so you can freely move your ridgeline.  We sell them individually so you can build a continuous ridgeline with a Dutch Hook on the other end. 


Made from titanium. Made in the USA."


The above wording is straight from Dutch, and his team.


This is a premium ridgeline tensioning device for small diametre  Dyneema/Zing-it!/Lash-It! tarpaulin ridgelines. The hole means it can be spliced onto a line.