Shawn, they were made for me specifically. Bill Duke did it as a favor. They were never produced as a trap for Dukes regular inventory.
Sales of the single spring 160 were extremely slow.The only reason everyone is interested in them now ,is because of high rat prices. My timing was not the best lol.
I was working with Bill on the re-desighn of their stop loss trap when I first brought up the 160 idea.
Tom