Factory Direct: 
 Distance measuring wheel, also known as: range finders, measuring wheels, large round feet. Mainly used for: indoor and outdoor site distance measurement. 
 Our factory specializes in the measurement round (ranging round) varieties, wheel diameter are: 97mm (3.8 ") 106mm (4.2") 142 (5.5 ") 159mm (6.2") 197mm (7.75 ") 318mm (12.5"), This series product is the most complete measurement of wheel manufacturers specifications. Recently the company has developed a LCD digital display screen, measuring wheel, distance measuring wheel.