Assembly is quick & easy:

Attach the NYLON red handle to your 2" or 2-1/2" dia vacuum tube.
Tighten the included wing-nut firmly, using pliers or other such tool if needed.
Insert 'shop vacuum' hose into the red handle and connect with the tube.
Tighten the included wing-nut firmly, using pliers or other such tool if needed.
Insert 'shop vacuum' hose into the red handle and connect with the tube.

Place the ALUMINUM jagged sleeve/bit onto the end of the vacuum tube.
Apply stick-on depth indicators at the appropriate distances on the tube. These markers will allow for consistent depth for your holes.
Apply stick-on depth indicators at the appropriate distances on the tube. These markers will allow for consistent depth for your holes.

Your final assembled tool will look like this picture.

While digging, rotate handle in a twisting motion.