Indexing tool

An indexing tool for positioning a workpiece, the tool comprising:

• a block having sides defining an outer surface, the sides defining a regular polygon, the block having a central opening, a threaded hole extending at a right angle to the central opening and into and through one of the sides, and the block has a V notch in a block wall opposite the threaded hole, the threaded hole being adapted to have received therein a like threaded set screw, wherein the central hole extends along a longitudinal length of the tool, and wherein the tool has a at least a first portion, a second portion and a third portion along its longitudinal length, each portion having sides defining a regular polygon, wherein the first regular polygon is a hexagon, wherein the second regular polygon is a octagon, and wherein the third regular polygon is a square.