The Seco Euro-Style Prism Pole System 5910-02-ARD is ideal for all handheld prism work, topos, or precise layout work. Its prism has a 25 mm diameter and a -17.5 mm offset. The holder has a 115 mm tilting axis height. Large white sight cones on both sides of the assembly make vertical angle pointing much easier for surveying professionals. And a 5/8 x 11 mounting thread allows the red aluminum assembly to attach to the included prism pole. This system also has an adjustable level vial with 40-minute sensitivity. An orange, Cordura carrying case is included for storing and transporting the assembly.