V-Blocks and Clamps, Complete Set with 2 V-Blocks and 2 Clamps (Matched Pair), 2-1/2" wide x 3" high x 3" long (63 x 75 x 75mm). Starrett V-Blocks come in a variety of styles to suit the numerous requirements of machinists. They are for general shop use and layout work, as well as for holding stock in place during light-duty milling, drilling, and grinding operations. All clamp screws have a hole to help secure the workpiece. V-Blocks (2) and Clamps (Matched Pair).