The estimator for the last roofing company we hired used one of those type ladders, I don't remember the brand. He was very happy with it and the fact he could do his work using a compact car. I was surprised how heavy it was but it could have been 20' or taller. Iirc the side poles were hexagonal, not round. I was interested in getting one for the camper until I realized it would have been $300+ for a 10'.