The Workhorse HMS aluminum carabiner is the strongest carabiner from the Mammut brand. Thanks to its dimensions and screw lock, it is easy to handle even in gloves and in difficult conditions and the key lock makes it easier to clipping and unclipping. The colored indicator on the lock warns you that the carabiner is not screwes closed, which ensures greater security. It is suitable for use as a central carabiner for anchoring. It has an anodized surface, so it is very durable and robust.