A very cheap stud.
Normally, I like to support my local fly shop. They deserve the business, I need them for advice, fly materials, new rods, and support of Denver Trout Unlimited. But this is a safety issue. Boot studs are absolutely essential on Colorado streams but $29.95 for 20 studs is just robbery. At a $1.50 per screw, it's not the boot sole that's being screwed. This is a SAFETY ISSUE. As you can see, my $29.95 studs are both rusted and worn down 1/2 way through the season. I'm ready for another solution.
So I stopped in at a local cycle shop and asked for ice studs for motocross racing on the ice. "Getting a jump on the season are you?" "No, just re-studing my wading boots for fly fishing." "You know, I always wanted to try that. We'll have to order them. It will be four days, pay in advance $24.95 for 250."
Now we're talking. $.10 rather than $1.50. At these prices I can afford to put nice fresh studs on both sets of boots and my wading sandals. Come-on boot makers. Get real. I'm sure you can make up some reason why your screws are $1.40 better but I doubt I'll be convinced. Your screws do rust, do get dull, and except for a ground off tip seem to be exactly the same as these ice studs. We'll see.