The Wire Torque Nut shape fits well in normal crack placements, but they have the extra advantage of working extremely well when placed in a camming position. When racked the Wire Torque Nuts hang neatly off your harness without getting in the way and also make the placing the nuts above your head easy and safe. Just 4 do the work of 6 old school hexes and because of their offset shapes they fit into a multitude of crack scenarios.
DMM is an awesome recreational climbing and mountaineering equipment company from Llanberis North Wales. Founded in 1981 they still make and test all their gear from home.