never really seen bolts like that, looks really short, not even past limbs when cocked??
leaving a lot of room for things to go wrong IMO
mine don't use anything like that, as I also got a box of bolts with them when I got em, all wooden shafts, feather vanes, and mor or less like a modern bolt, just fixed heads and nocks ( some of them were modified for plastic one's too, I gather the old owners did so as things advanced)
and all wood shafts!
not very thick either, but they did kill deer with em according to farmer I got em off of