The ultra tough blade has an easy to apply blade lock and an aerospace polymer end-hook which is mounted below the blade and enables the scale to be read right to the tip. Exact inside measurements are possible with the 100 mm case size making add-ons easy with the mouth cursor showing the precise reading. It also has a unique snap-in belt holder. Metric and imperial graduations. Length: 5m (16ft). Blade width: 19mm. BT5ME Big T Tape 5m/16ft (19mm width)