Designed to hold a Spherically Mounted Retro-Reflector or other Spherical Type Targets on centerline of a hole 1.000″ above or 25mm above and allows for the SMR to be rotated below horizontal all the way around, in an unimpeded fashion.

An optional sealed cap is offered to protect the nest from debris. A 6-32 tapped shank is standard on all .250″ shank diameters and above. Laser engraving available on cap.