I have a complete 3 piece set of Techtron Collimaion Tools and booklet for sale mint, purchased new May 2003. It includes the following:
Sight Tube... The basic mechanical alignment tool for Newtonian or Mak-Newt telescopes. This tool is necessary for placing the diagonal mirror in the proper place, and aiming the diagonal mirror at the center of the primary.
Cheshire... Once your diagonal is in the proper place, you are ready for the Cheshire. This tool is probably one of the most used tools of the set. It is used for very close collimating the primary on a Newtonian or Mak-Newt.
Autocollimator... This is the final step for collimating your Newtonian or Mak-Newt.