Having a hold rotate, or "spin" while you are climbing can be annoying. Here at Uncarved Block we are slowly adding a cure for this to our holds. This can happen due to the design of the holds allowing higher than normal amount of leverage being applied to the hold, or to any hold on a wall without a lot of texture on it.
You may have noticed some of our holds now come with another smaller hole in them. This is for a 10 gauge wood screw to stop holds from spinning. While using the hole is not nesccesary, you now have the option to use it, should the problem arise.