Yes , i saw them in a yankee shop ,so i made some my self,theres a lot of gorse near me and they work well for me,i set on a branch ,or a stone,so they hop,not push through,the pins are in perminantly,so its just a matter of clipping the trap on.
if it not rude to ask you to reveal your secret, how did you make them? did you have to turn them up on a lathe or just round over the end of a bar with a ball pien?