This is a tip for placing the blades and rings on pony head lures:
Use a small needle nose plier to hold the split ring, slide the spinner blade onto the split ring, with the blade just on the ring (holding the ring open) slide the pony head onto the ring, now slide both the blade and jig head around the ring until they are in position.
I have found that works best for me. The split ring pliers have been a waist of time and money.

