You wouldn\'t attempt a trad climb without them, smaller in size, the DMM Wallnut 4 ensures a reliable placement between tough rocks. With versatile orientation and grooved faces, the Wallnut 4 can fit between a variety of tricky rocks.Curved taper - for stable placement and resists lifting outCan be placed in two orientationsGrooved faces - added security on irregular rockColour coded - for size identificationRange: 11.0 / 17.6mmStrength: 12kNWeight: 30gEN Certification: 12270:2013