Center It enables drilling pipe and other round objects. The V-block bolts to the drill press table and enables the drilling of round pieces parallel and centered. 7/16″ groove with 118 degree angle lets you bottom drill bit to center v-block and bolt in place. V-block is 5″ long X 4″ wide X 1-3/4″ high. The V-block lets you drill any sizes of pipe and wood dowels for many more perfect projects. The grooves on the outer sides eliminates slipage while holding pipes on tables, etc., for sawing pipe on job sites or other applications.