Tape fiberglass and metal rolled. They supplied with screen printing in metric and imperial system. Tolsen robust tool brand, manufacturer of professional quality tools. The distance measuring wheel, also known as an odometer, is used to measure distance along a surface. A wheel spin measures a certain distance. The wheels of this topographic equipment provide a good level of precision when placed on a smooth surface. Ideal for measuring roads, streets or uneven terrain, thanks to the adaptability of this instrument. Replace the tape measure, when measuring long distances.