The Ultra D is similar in size and weight to the Ultra O; however it is stronger and has a slightly bigger gate opening. The open D shape gives a lot of internal space within the biner, which makes it useful for setting up belays. It’s also finding favour as a perfect partner to a belay device.
Available in screwgate and autolocking varieties.
No trad or aid rack is complete without a few DMM ULTRA D Carabiners in the mix. The open D-shape provides ample internal space for belay stations, and the biner is available in three different locking options so you can choose the one that best suits you.