"Tarp Flyz – A truly unique device developed to connect your tarp to a tree with thin 1.75mm hollow braid line. Made from titanium, Dutch Flyz are the smallest, strongest, and fastest way to tie off to a tree without actually tying and untying a knot, even when wearing mittens. Designed for the most weight conscious hiker Dutch Flyz weigh only 2 grams.
They can be moved easily to any part of your ridgeline and quickly locked into position. Their unique design will hold in the windiest condition and never need a backup knot.
The above wording is straight from Dutch, and his team.