Becomes dependable drill jig For drilling quantities of the same part.  1/4 turn of "T" anchor clamp locks vise securely at any position on table.  Many uses beyond those indicated here.  It's outstanding for holding small fixtures, keeps hands away from the drill point and eliminates the danger of small jigs flying off the table.  An off-table mounting attachment provides the full advantage of the maximum jaw opening on small tables, and also eliminates drilling the table.