DAVIS 3 1/4" - Perni a due fori - Alluminio - 1/2-13 filettature e manopole rapide
They are made of 6061 Alum. They have 1/2"-13 threads and 45 degree taper, threaded rod is removable, so you can add longer threaded rod if needed. This is for one set of 3 1/4" two hole flange pins shown.