The Brunson 1.5THDN-B Bolt-On Drift Nest offers a secure, temporary mounting solution for 1.5" SMRs (Spherically Mounted Retroreflectors). Designed for flexibility in metrology and laser tracking setups, this bolt-on adapter uses a standard #10 or M5 cap screw to mount onto machine tools, concrete, pillars, stands, or other structures.

A front-mounted magnet securely holds the SMR in place, ensuring precise alignment during measurement. Once your project is complete, simply remove and reuse the adapter. Ideal for creating fixed, repeatable reference points in dynamic or multi-location measurement environments. Compatible with any 1.5" SMR.