Riser blocks are five-faced machined having accurately machined holes in a diagonal pattern. One can use riser blocks for CYCLOTRON Modular fixture welding table extensions for long projects. ONE can use riser blocks individually, or stacked, to elevate a workpiece. Use the Blocks to mount a CYCLOTRON plate to the side or end of the table, or to join tables together. Riser blocks can be used as a beam.