The Stanley Intelli Level MW40M Counter Measuring Wheel is gear driven with a tough plastic housing. It has a 5-digit counter with a manual reset button. The wheel is made from die-cast aluminium and fitted with a wear resistant rubber tread. Fitted with a heavy-duty, metal folding handle with rubber grip for easy handling. There is also a folding wheel mount. Supplied with: 1 x Manual and 1 x Carry Bag Specification: Max. Distance: 9999.99 MetresWheel Diameter: 318mm (12.5in)Working Environment: Built for exterior use, larger wheel for rougher groundWorking Accuracy: ± 1% TypicallyUnits of Measurement: Metres and Tenths of a MetreAdditional Information:Wheel Diameter (mm): 318Metric/Imperial: Metric