From Guild Wars 2 Wiki
Zephyrite Lockpicks are used to unlock Buried Locked Chests across Dry Top.“
This key opens a buried locked chest in Dry Top. These chests are only visible during sandstorms.
Buried locked chests can contain armor, weapons, rare skins, recipes, ambrite, and more.
— In-game description
- Completing Cornered, Prosperity's Mystery, Trouble at Fort Salma, The Machine, The Waypoint Conundrum, Plan of Attack, and Taimi and the Asura.
- Only by those in Dry Top, will not drop in other locations outside of Dry Top.