Thule D1251 Change Key The Thule D1251 change key is used for extracting Thule barrels from roof boxes, roof bars, cycle racks etc that are part of the N001-N200 or N001R TO N200R series, in order for them to be replaced. Please note, this will only extract barrels that are unlocked. Also compatible with other N series locks by manufacturers including Atera, Inno, Hapro, Kamei, Mont Blanc, Auto-Plas, Karrite and Halfords.
