The Draper Keyring Digital Tyre Pressure and Tread Depth Gauge is a compact, dual-function tool designed to help drivers and vehicle technicians quickly check both tyre pressure and tread depth in one convenient device. Measuring pressure in both psi and bar, this digital gauge provides a clear, easy-to-read readout suitable for a wide range of vehicles. Its compact keyring form factor means it can be kept to hand at all times — ideal for mechanics, fleet operators, and motorists who need a reliable gauge available wherever they are. The built-in auto shut-off activates after 90 seconds of inactivity, helping to preserve battery life and extend the service life of the included CR2032 3V lithium coin battery. Features and Benefits: • Dual pressure display in psi and bar for versatile, at-a-glance readings • Tyre tread depth measurement function for quick safety checks • Compact keyring design for convenient everyday carry • Auto shut-off after 90 seconds to conserve battery life • Powered by CR2032 3V lithium coin battery (supplied) Specifications: Battery: CR2032 3V lithium coin battery (included) Auto shut-off: 90 seconds