Zombie head
Crafting ring was removed from RuneScape after 8 October 2013, but still exists in-game for those who had obtained it.
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Crafting ring detail

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.

Tier Experience per level of Crafting Experience at level 99 of Crafting
1 411.33 exp per level 40,722
2 454.3 exp per level 44,975.7
3 470.1 exp per level 46,540
4 512 exp per level 50,724.3
5 529 exp per level 52,357
6 550 exp per level 54,461
7 566 exp per level 55,042
Combat Stats
NoneRing slotDefenceArmour0
ConstitutionLife points0
Damage--Damage reduction
Accuracy--PvM: 0%PvP: 0%
Style-Style bonuses