This is the second pair of these I've purchased. I've also purchased them for family.
The first ones are still good but worn of course and going on three years.
I got this pair for another set of boots so I would not have to swap them.
Take a look at other grippers. The spring loaded ones have a tendency to slip sideways. The ones with only a grip at the ball or front of the foot are not good. When you take a step what lands first?  Your heel.  So you need grips at BOTH ends.
Ones with a large amount of flat rubber on the bottom that the little spikes fit into are ok until you walk in deep snow. Also the little spikes wear out quicker and the snow works between your boot and the rubber and OOP'S where went my spikes?
These "Stabilicers Lite Duty" spikes are not your easy on and off but that's ok. You want them to stay on and in place.
You won't be disappointed if you purchase these!