Professional optical level robust, reliable and ideal for outdoor use. Fast aperture for excellent staff reading and a target collimator for rough alignment. The compensator lock makes for safe transport and the Penta prism makes it incredibly easy for the user to read the red circular vial. It boasts erect image and a large focusing knob for easy alignment as well as friction-braked rotation.All products are supplied with an adjusting pin, hex key, lens cover, plumb bob and carry case. Models 0 615 994 04R and 0 615 994 0AX also come with a Measuring Rod and Tripod.FEATURES Target collimator for rough alignment Penta prism makes it easy to read the circular vial Erect image Large focusing knob for easy alignment Fast aperture for a sharp image of the target (measuring rod) Endless degree/angle setting using knobs with friction-braked rotation Ideal for outdoor use due to a robust housing with dust and splash protection Fast aperture for excellent staff reading Compensator lock for safe transport