I bought these for my 40 degree home board and they are great, but they certainly pack a punch. A few of them I was able to use on the plain of the wall and they factor into a lot my harder boulders. However, I found the less positive holds in the set (yellow, orange, and red in the photo) to be much more useful when set on a volume. Without the volumes, a problem using just these holds at 40 degrees is probably at least V8. At lower angles or on volumes they can easily be incorporated into easier boulders, and they are very fun and extremely comfortable with the ergonomics and texture.