This arm strengthening climbing ladder has five rungs that are bolted to the outside rails, the first foour are 8" apart and the top one is approximately 10" above the others. This upper body strength developer angles 17 degrees away from the wall for safety. It is made from heavy-duty tubular galvanized steel, so it is sure to last throughout all your arm strengthening exercisess. Its overall dimensions are 45"L x 24"W. This ladder comes with mounting hardware for mounting it to a wood wall or wood wall pads.