Skid Resistance Tester is the piece of test equipment for measuring polished stone value and skid resistance value. It gives a measure of the friction between a skidding tyre and wet road surface. It can be used for testing slip resistance of floors and sports surfaces. The nickname originates from the pendulum action of the rubber slider that contacts the surface to be tested. An important application of the Skid Tester is in the laboratory determination of the resistance of roadstone to polishing.