Stanley Optical Level Al24G Optical Level (Degrees) - Site Pack Set With Tripod And Staff 1-77-159NAbout this Item:24X MagnificationMagnetically dampened wire hung compensator within transit lock for optimum transit lock for accuracy and rangeFor foundation form work, leveling, grading and drainageFine adjustment knobs on left and right sides with friction-braked rotation for continous easy horizontal movementLarge effective aperture with 30cm minimum focal range1 year Warranty