AdirPro's 711-38 one-piece light-weight rugged carbon fiber snap-lock rover rod extends from 1.354 to 2 meters and features snap and compression locking systems for increased security by preventing slippage and maintaining perfect straightness. Its 40-minute vial coupled with external graduations in 10ths and 100ths contribute to efficiency and precision. If you are looking for a precise, user-friendly GPS rover rod with a fast setup the AdirPros 711-38 is the one for you.