Hello Cody The old nocks were made in the 1920s and up old mid nocks made to the 70s all look the same infact some were made of alluminum. I have some in 9/32 and 1/4 I used them for flightshooting i was amazed that they helled up very well from longbows way over 100# plus poundage. Which i used a english longbow 120# shot a world record 353 yards. I also have special made alluminum nocks made those are for large diameter arrows 23/64 to 3/8 size. Maybe ill go to a machine shop have some of my old mid nocks made of alluminum. marlon