Heavy Duty roll: The ruler is 15mm wide and 0.12mm thick, very strong, 16 feet /5 meters, specially equipped with diamond hooks, non-slip, while remaining strong in harsh environments. Automatic locking mechanism and retract: High performance spring internal smooth retract at the appropriate speed; Automatic stop mechanism to prevent sudden recovery; A large retraction thumb button, very easy to control. Double-sided marking: double-sided metric and imperial measurements for all types of work. The large, bold numbers make it easy to read every time, and more convenient for the eyes. Nylon sheet, rust - proof, anti-corrosion. Drop resistant and durable: The compact ABS housing ensures a comfortable grip and longer life. We have carried out quite a few tests to ensure better protection in the event of a drop. Date First Available November 28, 2023