CarPlan Snow treads, Pack of 2. To use: Park the vehicle with the hand brake on, wedge treads under the front/rear tyres dependant on drive wheels, place treads behind the wheel for reversing and in front of the wheels to drive forward, accelerate slowly, if tyres spin the tread will need repositioning, once on firmer ground stop vehicle and collect treads. Suitable for use on snow, ice, mud and sand these snow treads are ideal to keep in your boot ready to save you should an extreme weather emergency occur. Snow treads by CarPlan.