GPR1 Single Circular Prism 40-6391 It also has a kickstand

It also has a kickstand that lets you leave it standing for a while as you drink a glass of water or talk to a friend over the phone

and a working range of up to 50 feet

This self-leveling tool can also be used in cabinetry

The beams have an accuracy of ±1/8-inch at 50 feet and range of up to 100 feet indoors depending on the lighting conditions

GPR1 Single Circular Prism 40-6391 It also has a kickstandListing Archived on June 5, 2025. The Leica GPR1 Single Circular Prism is a precision round prism that easily snaps on to prism poles. It features a centering accuracy of 2. 0 millimeters with zero millimeter offset. The GPR1 is manufactured from high quality optical glass for increased range and accuracy. This Leica round prism's surface is coated with anti reflection copper which also improves reflectivity and prevents adverse dirt or condensation.