These went into the soles of my wading boots in about five minutes and the grip on wet river rock is night and day compared to the rubber alone. I was nervous about the screw heads tearing up my boots, but they seat flush and haven't budged after a full season.
Thomas★★★★★
Screwing these into my old boots took maybe ten minutes with a cordless drill, and the grip on wet river rock is night and day compared to the worn felt I had before. They sit flush enough that I forget they're there until I hit a slick patch and don't slip.
David W.★★★★★
These screwed straight into my wading boots in about two minutes with a regular screwdriver, way faster than my old glued-on studs. They bite into wet river rock really well. Almost ate it twice last weekend before I put these on, so it's a big difference.