Cliff Hangers or grip ledges are a great way to get your fingers into shape for texting, knitting, playing video games and of course Ninja Warrior.  Shown here are 2”x15”long ledges, which can be mounted with a flat edges or a 15 degree slope for an easier grip. There are 6 screw holes for mounting on to any flat surface. Level up and install it as a vertical limit ledge. Hardware not included.