HFS (Tm) Adjustable Clamp T Slot 5/8" Nominal Clamping Range up to 3" 2Pcs/Set New Table T Slot Size: 5/8" Stud Thread: 1/2''-13 Stud Overall Length: 4-1/2" Clamp Width: 1-3/4" Max Clamping Capacity: Up to 3"