The crafting ring is made by right-clicking the uncharged ring and selecting "Charge" within the Crafting skill plot area of the Clan Citadel, which requires a tier 5 Citadel. The ring also requires a Crafting level of 40 to be charged. It gives 150% Crafting experience until you have gained a certain amount of experience, determined by your level and the tier of the Crafting plot, after which it crumbles to dust. A new uncharged ring can only be obtained after this one has been used up. The experience multiplier stacks with the boost given by a Dwarven army axe. It also stacks with the sacred clay needle.