I am SUPER unhappy with these biners. I have bought a ton of these biners lately and have a bunch setup as alpine draws paired with mammut contact slings. The biners function pretty well, no complaints there, however the rivet that holds the wiregate in place has sharp burrs all the way around the edges. I have only been using these biners for about a month or so, but these sharp burrs consistently catch and tear my mammut slings causing them to fray extremely fast. I don't know if I just got defective biners or what. After further inspection, it appears that the rivets that hold the wire gates on are not fully seated against the biners causing the sharp edge to sit higher up, which worsens the issue. This issue varies a little, but among the among the over 30 of these biners I have bought recently, it is a common problem throughout the set. I'm not stoked that my mammut contact slings are already getting all torn up from these biners as I just bought many of them.