Panavise Tri-foot Base<div style="text-align: left;"><strong>[Product Information]</strong><br><ul><li>Choose one of our unique Bases depending on the application at hand. Simply assemble the Adjusting Knuckle， Shaft and Base and you're done!</li><li>Tri-foot Base with three 0.265" (6.7mm) holes on a 3.25" (82.5mm) bolt circle; 4" (101.6mm) outside diameter</li><li>1/4-20 mounting stud</li><li>Tri-foot Base with three 0.265-Inch (6.7mm) holes on a 3.25-Inch (82.5mm) bolt circle; 4-Inch (101.6mm) outside diameter</li><li>0.25-Inch 20 mounting stud</li></ul></div><img src="http://ecx.images-amazon.com/images/I/31%2BBKgNKVwL.jpg" noproxy>