Two different types listed. See last 3 pics for dovetail adapter. $45 for a 12" long piece of either type.
1/2" wide groove. There are places where a top die was welded on top of these risers. Would work perfect for an H Press so you can change out your dies.
Dove Tail Press Brake Die Holder Filler Block Tooling Forming 1/2" tang adapter
These are all American 1/2" wide tang to DOVE TAIL groove.