Big Wall Terminal 8 Descender - UIAA Certified 40KN UIAA CERTIFIED: The last word in climbing certifications. Our 40KN certified Terminal 8 Device is perfect for Belay, Rappelling, Training, Silks and more RESCUE 8 WITH TERMINALS: Big Wall Climbings Terminal 8 with Ears is an improvement over standard figure 8 devices with improved breaking and safety features. SOLID CONSTRUCTION: Strong and Lightweight Aluminum Body with low acid paint.