Step 1: Supplies
The supply list for this hitch is well under 5 bucks, here is what i used:
1 Male Airhose coupling
1 1/4" bolt
1 1/4" nut
1 U bolt (1 and 1/4")
Drill bits necessary to complete the job.
Step 2: Drill the Ubolt Plate
Step 3: Put the Bolt and Nut On
Put the nut on the bolt and the put the bolt through the metal plate like the picture below.
Step 4: Thread The Airhose Coupling On
Thread the airhose coupling onto the bolt, Use 2 wrenches to tighten everything down sufficiently.
Step 6: Attach to the seatpost
Lastly attach the hardware to your seat post and ride! If you don't want to scratch your bike seat post, wrap it in an inner tube. Use a crescent wrench to tighten it down.