The binding necklace is an enchanted jewellery item that gives the wearer a 100% success rate in making combination runes through the Runecrafting skill. It has 16 uses (one use is one click on an altar) and will be destroyed once all are used. It has a right-click “check” option that shows how many charges are left.
Players with 27 Magic or higher can make it by casting Lvl-2 Enchant on an Emerald necklace. It can also be obtained as a drop by the monsters in the Abyss.
Prior to an update, the binding necklace was one of only two pieces of jewellery to change their appearance slightly upon being enchanted, the other being the amulet of fury.