This is the clamp that fits over the laser tube, and fits onto the vertical post that holds the laser in the Simple Hollowing System.

This clamp is machined from aluminum and anodized red.

It comes with the 1/4-20 x 1/4" long stainless set screw as shown. The brass knob is not included as most already have that piece. The brass knob can be purchased separately if it's needed.