I purchased a couple of these for my home spray wall. Since I'm setting problems for myself, sometimes it takes time to dial in the exact level of crux challenge. The 4 different edge angles allow for fine tuning, even when t-nuts are always 8" apart. Once the problem is dialed with the most incut edge, I can rotate the crimp tile 90 deg and have the crux hold sloping 10 deg more, then 20 deg more, etc. Great for slowly ramping up the "try hard."
