These targets work with most EDMs and are ideal for monitoring work where you have to leave targets in position over long periods.
Made in the USA, the rock hard MAG NAIL has become the chosen nail among surveyors worldwide. Six sizes available.
The precise marks on the head allow easy alignment through an instrument's optical plumbing device. Three sizes available.
Monitors the opening and closing of a crack as well as shear movement.
Check for hygroscopic salts contamination - nitrates and chlorides.