TTC VBF-3 2-3/4" x 2-1/2" x 1-3/4" Precision Matched Pair V-Block & Clamp Set Accurate enough to use for layout and surface plate work. All sides ground square and parallel to each other .V's are ground central, parallel and square to the ends. Rugged enough for machining operations. Made of hardened and ground chrome steel. 90 "V" Angles.