Wall-mounted height rod features an easy-to-install design to set up quickly using simple tools & the provided hardware. Lockable headpiece & clear indicator allow you to quickly read the height measurement to prevent reading errors. Adjustable measuring range of over 55" lets you select a measuring range for children or adults. High-strength rod resists bending & ensures that the headpiece slides smoothly. Doubled-sided measuring tape enables you to choose centimeters only or feet / inches / centimeters.