Chaos gauntlets are a pair of gloves available after completing the Family Crest quest. The gauntlets, when worn, increase the maximum damage done by all Bolt spells by 3, thus making the max hit of a specific bolt spell only 1 behind the blast spells of the same element.
These gloves can be obtained by bringing steel gauntlets to Johnathon, one of the sons in the Family Crest quest. Johnathon is located upstairs in the Jolly Boar Inn, which is northeast of Varrock. If you bring the gauntlets to Johnathon (and they have already been imbued with another power) you must bring 25,000 coins to change them.
There are no requirements to wear these gloves. Note: If dropped or lost due to death, they can be re-obtained free of charge from Dimintheis.
Upon paying Johnathon to change your gauntlets, the following message appears: Johnathon takes your gauntlets from you, and begins a low chant over them. You see them glow and sparkle, before he returns them to you.