DMM Wallnuts look different than most other Climbing Nuts they feature a small groove running vertically up one side of their head. This groove helps them excel at irregular rock types such as limestone and crystallized granite. The groove also makes the nuts more stable, helping them seat better and making them less prone to being pulled out by rope drag or while climbing past them. According to DMM, the groove also allows the nut to be placed half in, half out of the rock, a scary thought that we never tested. This same groove does make them harder to clean than other models only the Metolius Ultralight Curve Nut was harder. DMM Wallnuts are also known to be extremely durable, a result of hot forging the heads of the smaller size nuts. Wallnuts have a larger curve than most, making them among the best we reviewed at fitting into parallel cracks.
If you are a beginner these nuts seat well and are less prone to popping out. That said, they are among the most difficult to clean. The fact that Wallnuts share the same color scheme as the rest of the Wild Country and DMM Offset Nut makes adding pieces to your rack a breeze.