RT66 CST/berger 25” Single Measuring Wheel (Rolatape) RT66 CST/berger 25” Single Measuring Wheel (Rolatape) features reading distances on wheel counter to turn one time for every 6.6ft and can read up to a maximum of 10,000ft for accurate distance measurements every time. RT66 CST/berger 25” Single Measuring Wheel (Rolatape) features a large study steel wheel which allows for easier use when measuring long distances in a variety of terrain and has a pistol grip, telescopic aluminum handle for maximum comfort.