The Keson RR112 Roadrunner Measuring Wheel is a portable and compact tool from the brand Keson. It has a 4" diameter wheel and can retract to a height of 17" to 28". This measuring wheel is designed for use in standard (SAE) measurements and is made in Austria. Ideal for home, business, garden, and workshop projects, the Keson RR112 is a reliable tool for accurate measurements.