The GIS/Survey Arm and Clamp - No Bracket (28178) is a pole mount assembly made to fit standard 1.25" diameter GIS/survey poles. It features a dual-socketed RAM® B size (1") arm, with a claw-style clamp for a GIS/survey pole on one end and an AMPS hole pattern plate on the other (both attached using RAM® B size (1") balls).
Compatible with Allegro 2, Allegro 3, Mesa 2, Mesa 3 Android, Mesa 3 Windows and Mesa 4 Windows.