Not to be a smart aleck but your hands are the best tool. Learn how to set them without a tool because inevitably you will lose the tool. Watch a couple of videos and it boils down to technique. Place the barrel on its back with the springs up. Take the meaty part of your hands by your thumbs and press down on the wires. Once depressed take one hand and flip the dog in place.
Not so easy for guys with arthritic hands. I can usually still set them by hand, but there are days when it's a struggle. A setting tool is handy on those days.
Yep try doing it where the pain is so bad your vision starts blacking out, I can still do the 110s on up to the 160s but 220s and 330s are a no go
And DPs and bigger footholds are no better every season I thank One Hand setters and whoever came up with the DP setters I bought years ago, I don’t know who came up with those but they work great I bought 3 for 5 dollars apiece back when I bought my first DPs but I still have all 3 and they still work great
Loosing your setters is why you always have a couple of spares in the truck just like any other trapping tool, I bet there isn’t a person on here who hasn’t lost their pliers, hammer or other tool at some time, and I bet no one is going to suggest they learn to do without, after all our mountain man ancestors did without all the modern dodads
Personally I prefer the setters that look like one of those old time calking guns even if they are a lot more expensive then the thong type, I just find then easier to use