Destroyer Gauntlets

The Destroyer Gauntlets are the Tier 5 Warrior DPS gloves. They provide a bonus to strength, stamina, and critical strike rating. They are part of the Destroyer Battlegear set.

Source
This item is sold by in the Seer's Library on the Scryer's Tier and by  in the Shrine of Unending Light on Aldor Rise in Shattrath City. The cost of the item is a Gloves of the Vanquished Defender token.