Simply remove the existing knob and tighten the clamp with the security knob. Once tightened, the security knob can be removed to deter theft. Garmin Rino 610 / Garmin Rino 650 / Garmin Rino 650t / Garmin Rino 655t / Garmin Rino 700 / Garmin Rino 750 / Garmin Rino 755t.
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