I use the self tapping gutter screws for ice and stream trout fishing ( hip boots and chest waders). All you need is 3 in the heal. I prefer the hex headed ones. I have tried other styles but not any where near as comfortable or grip any better. Also If you need to go into a building just hold your heal up a little and the screws do not touch. If like me sometimes I need to go into the house for a item I forgot so I do not need to be removing cleats.