The Streetwize Digital Tyre Tread Depth Gauge is easy to use with On/Off and Zero (reset) buttons. Total length (approx.): 115 mm. Display size (approx.): L 36 x W 11mm.
PLEASE NOTE: The legal limit for minimum depth of the tread on your tyres is 1.6 millimetres, across the central ¾ of the tread around the complete circumference of the tyre.