ABS case with steel binding and 12mm wide tape with phosphate coating for rust protection. Enamelled and lacquered coating protects metric and imperial printed graduations. Metal end hooks and claw. Class 3 accuracy. ABS case with steel binding and 12mm wide tape with phosphate coating for rust protection. Enamelled and lacquered coating protects metric and imperial printed graduations. Metal end hooks and claw. Class 3 accuracy.