dvo4624882 wrote a review of Metolius Rock Rings CNC 3D on May 14, 2012
I have had these for 2 months and have yet to get bored and just keep getting stronger.
My latest game is "build a belay, dead ass variation" Use a log or stool to hang 50 degrees or so. Do 15 pullups, then Lock off with the right hand and place a red or pink tricam in the left pocket. Lock off with the left hand and place a TCU or master cam in one of the right pockets and then sling an anchor and attach your harness and hang. Reverse process and have a beer. It is nice to know you can building an anchor when you are totally pumped.
Are they made to do this... probably not, but I've been doing it for a month and they look like new.