Toktz-xil-ul are obsidian throwing rings that require level 60 Ranged to wield and can be purchased for 375 Tokkul each from the obsidian weapons store. They are quite powerful, having stats equivalent to a magic shortbow in conjunction with rune arrows, making them one of the more powerful thrown weapons. Because of this, and the fact that they can be equipped with a shield, they are seen in PvP scenarios quite often. However, they are significantly more expensive than rune arrows, making them less practical for general use.
Twenty-five of these are used to build an obsidian fence at level 83 Construction in a player’s Superior Garden.