It allows you to use an polar alignment scope PF-LII, polar alignment scope PF-L or SX polar axis scope for the POLARIE U.
The polar scope arm bracket can be attached to the 3/8-inch socket on the bottom (rear) of the POLARIE U after unscrewing the 1/4" to 3/8" conversion socket screw. If this is the case, the removed conversion socket screw can be stored by screwing into the 3/8" holes on the arm bracket to avoid losing.
