Family gauntlets

Family gauntlets are a reward for completing the Family Crest quest. Players can take them to any of the three brothers from the quest and have them enchant the gauntlets with a special ability. Players can only have one effect at a time, and it will cost 25,000 coins to change the effect of the gauntlets.

If a player loses the gauntlets, they will have magically returned to Dimintheis who will give them back with its previous enchantment. The gloves may be re-obtained in its original form after finishing the quest Defender of Varrock while the gauntlets are not in your possession (including your bank).

Cooking gauntlets
Bring the family gauntlets to Caleb in Gertrude's house west of Varrock. Cooking gauntlets greatly decrease the chance of burning fish, particularly lobster, swordfish, monkfish, shark, cavefish and rocktail.

Goldsmith gauntlets
Bring the family gauntlets to Avan at the Al-Kharid mine. Goldsmith gauntlets increase the Smithing experience of smelting gold from 22.5 to 56.2. This makes smelting gold bars more efficient, but it is still unprofitable: gold ore is worth coins and smelting it gives a loss of  coins per bar, or  coins per exp.

Chaos gauntlets
Bring the family gauntlets to Johnathon in the pub to the north-east of Varrock (near the Wilderness border). Chaos Gauntlets provide a 10% damage boost to all Bolt spells. This boost was removed with the Evolution of Combat, but was brought back on 24 March 2014.

Trivia

 * This item was originally known as steel gauntlets.
 * If they weren't enchanted before being lost, Dimintheis returns a set of cooking gauntlets instead.