I placed this set on my 60° wall and would say they require a minimum of V6 strength to use them at this angle. I have very fat fingers, yet I am able to squeeze 4 fingers onto each of these holds. They feel about half the size (depth wise) of the Brain Coral Steep Wall Crimp set. If you are looking to increase your finger strength on steep angles these are perfect for that. Affordable, and fit in the tightest of spaces on your wall. If you don't have the strength to use these on steep angles they work well as foot holds too, so maybe you buy them for feet until you are strong enough to use them for hand holds.