Tekton offset box end wrenches have 45 degree offset box ends, creating clearance for your fingers and making it easier to reach around obstructions, the 12-point box ends fit multiple types of fasteners including 6-point, 12-point and square. Radiused corners in the box ends apply force to a fastener's flat sides, rather than its corners, preventing fastener round-off. Each wrench is permanently marked with a stamped marking for easy size identification, the wrenches are made from 6140 chromium-vanadium steel and are heat-treated to 42-48 HRC. Chrome plating on the wrenches provide resistance to corrosion, this set includes a modular slotted organizer that fits most toolbox drawers, keeping your wrenches neatly arranged with consistent spacing.