I am selling a Topcon LN-100 3D Layout Tool. This set up is in MINT condition and ready to go to work. This unit is designed for construction layout. These are great for interior layout as well as foundation and footings. This is a single person operation for performing precise 3D layout. This basically blends a self-leveling laser with a robotic total station. Also included is the column clamp for your interior work. This is a Wi-fi model.