The Stanley Key Ring Tape has a Mylar coated steel blade with metric graduations and an impressive stand out of 90cm. It has a high-impact abs plastic case with a soft-grip, rubberised outer casing to help it withstand the usual knocks and bumps. The 2-rivet, corrosion resistant, tru-zero hook allows for accurate inside and outside measurements. The blade is kept firmly in place via a strong, smooth action locking mechanism.