For precise setups and traversing applications 2.5X optical plummet 60-second plate vial, adjustable Precision-machined axis rotates 360360° Compatible with all prisms with a 24.9 mm bayonet base Adjustable height:100 mm-to-120 mm Traverse tribrach adapter fits all standard three-prong tribrach The over point accuracy is 0.5 mm at 1.5 m Includes: 05-3511 Tribrach Adapter.