Your go-to for heavy-duty applications when an oval carabiner won't cut it, this D-shaped carabiner offers a larger gate opening to accommodate a wider variety of applications. This carabiner stands up to the job with its 23mm gate opening for larger equipment compatibility and a 3600 lb gate strength for safety and reliability. Triple-action auto lock (3-stage). Certified to CSA, Z359.12, EN362-2004/B.