Vanguard QS-39 1/4-Inch Camera Screw Quick Shoe Compatible with Tracker Series, Some Alta Series, and Some MG Series Tripods Quick shoe for Vanguard tripods Compatible with Tracker S, Tracker 1-4, Tracker B-100, Tracker B-200, Alta+ 234AB, Alta+ 264AB, MG-8, and MG-8 OS tripods 1/4" camera mounting screw and pin