Brunson threaded 3/8"-24 Invar to 1.5" Diameter SMR (1.5INV-1) Scribes & Punches Brunson scales have optical targets

Brunson scales have optical targets evenly spaced every 2 mm

Female 1/4 x 20 threaded mounting

The other end provides a concave mount that is made to fit on a 1/2" tooling ball

For accurate distance measurements with tachymeters or total stations

Brunson threaded 3/8"-24 Invar to 1.5" Diameter SMR (1.5INV-1) Scribes & Punches Brunson scales have optical targetsUse an SMR target with your Invar System The 1. 5INV Series magnetic adapters provide an SMR nest which fits on any of our Invar System bars. With both English and metric versions available, the centerpoint of a 1. 5" diameter SMR may be held either 1. 000" or 25mm away from the interface surface between the adapter and the Invar bar. The SMR seats on a 3 point conical land and is held in place by a strong magnet. The discontinuous three point