6938 T&E tools Digital Tyre Tread Depth Gauge

6938 T&E tools Digital Tyre Tread Depth Gauge. Large LCD display. Zero setting at any position. Metric/Inch system interchange. Manual power on/off. Suitable for tread depth, break shoe and pad wear. Supplied with SR44,1.5V Micro button battery. Length: 3.1/2"(90mm)