Thank you for all the responses.
Bikermutt07, Yes, the saddle strings are used for tying slickers, lead ropes, cow whips... etc.
Josh and Ron, I get my buffed HO from Panhandle Leather or Montana Leather. Both usually have it in stock. The way I get it slick like that is that I apply Bee Natural #1 saddle oil and Ray Holes saddle butter.
Thanks, Clyde