62mm prism mounted in a tilting metal holder with removable target plate.

Mount: Push button 12mm (Leica) Spigot.

Leica constant 0.0mm. Trimble/Topcon constant -34.4mm.

Centring accuracy: 1mm, range up to 3,500 metres.

***For Trimble users, issues can occur if copper-coated prisms with anti-reflection coating are used with SX Series instruments due to the wavelength of the Trimble SX Series EDM of 1.55µm.