The Tripod Hook is a simple solution for attaching the new Trimble TSC3 or Spectra Precision Ranger 3 Controller to an instrument tripodMade of strong stainless steel, designed to fit precisely on the back of the controller with or without the units hand strap in place Install or remove the clip easily with a #1 Phillips screwdriverWorks with most heavy-duty total station-grade tripods that feature a connecting bar on the hinge area