Who wouldn't want to have some long, strong tethers around for the most various uses? It can only be leather if you don't like the ugly webbing other tethers are made of!
As only one end has a buckle, you want to know how to tie sturdy knots good enough to be able to use these black beauties in all possible ways! Otherwise you better start to educate yourself, because leather tethers have their unique pleasures just like shibari ropes do! Amazingly versatile gear I adore!