All DMM's carabiners are designed with a specific function or purpose in mind, and its easy to see from a quick glance at the Thor's impressive stats exactly what sets this biner apart. Following the classic lines of the Spectre 2, the Thor's meatier back means that it achieves a confidence inspiring 11kN gate open rating, and also offers an even more generous rope radius to help care for your rope. The gate opening of 27mm makes rope clipping very nice. This biner is truly versatile, and could equally be used for trad, sport or winter climbing alike. If its extra security and robustness you are looking for, then this is an obvious choice. Note that this item of climbing safety equipment is non returnable. Please call us toll free at 877 236 8428 or e mail bentgatebentgate.com with any questions.