I've got a pair of strap on rubber soles that have screws in them like that. They go on over my regular work boots with velcro straps. I keep them in the trunk of the car. The trail where I walk my dog gets hard packed snow from everybody walking on it. Eventually it turns to ice and can be quit trecherous. They've saved me from a bad fall many times.
EDIT: Forgot to mention, Nice mod,