Johnson's 1879-0115 Metal Measuring Wheel features a 5 digit push button counter, heavy duty steel frame, a solid aluminum alloy wheel with rubber tire and a fold down handle. Measuring wheel are used for indoor and outdoor construction projects whenever long range measurements are required such as road construction, estimating parking lots and driveway installations and resurfacing, pouring concrete, measuring buildings and lot lines. Interior applications include gyms, commercial hallways and residential room measurement. Users include surveyors, civil engineers, landscape architects, paving crews, insurance representatives and others.