This is a great set of foot holds. The coolest feature on these is the little rib that runs about halfway around on each of them. It's just right for catching your toe on when climbing overhung terrain. I have found they are great for training. By that I mean, if your foot work is sloppy, your feet will slip off of these but when you learn to put pressure down on your foot that little rib grabs onto your shoe rubber and really helps. These are the foot holds that remind me to pay attention to my feet. Then, if you don't want to use the rib you can rotate them 180 degrees and they become cobbles!! So cool.