https://i.ibb.co/vL3ZT6k/Unknown.jpg Thanks JT
They are not pen stands. The big ones on the dome end are 5/8" and 7/16" on the other end with a 1/4" hole from the dome end. The smaller ones are 7/16" dome, 5/16 and 1/8" hole. I bought a lot of stuff from a deceased penturner and everything in the box where these were came from PSI. I have catalogs back to 2003 and find nothing and have looked at every instruction on PSIs website.