If you have a wife, friend, daughter who is into beading. They have a great range of split ring pliers.
I think better suited to the small 00 size rings.
These are readily available at craft shops and in my opinion are better quality and better value for money.
Downside is generally designed for small hands.
Also when i change trebles. Once I split the ring and just start passing the eye of the hook through the ring so I can remove it. I also follow directly behind it with the new treble. This way i am removing and adding the new treble at the same time. Beats repeating the process
cheers
b