I put them on my Bridger 150's that I use for mink.They seem to help.I have also used smaller HIM body grippers with the bell shaped triggers.The also work well.
I use them. I make a 2 1/2'' circle out of the trigger wires then cut the bottom 1/3 off the circle and put thin green florist wire on the bottom 1/3 of the circle. It does increase my mink take.