It doesn't matter how thick the springlock suits are, and, answering the one below that too, the more you break up a piece of Metal and put hinges and the like on it, the less durable it'll be to say, a punch, because that's just more things to break, it's basic robotics that the stuff you want protecting(if you want it protected at all) gets solid pieces of, hopefully, Armored metal via a quench, steel(what's likely used) and Aluminum being the most common, but that doesn't matter if the robot is literally moving out of the way somehow, and using Spring Bonnie as an example again, pretty damn well, which doesn't speak well to how many hinges and small joints the springlock suits must have to let a guy like William into Spring Bonnie, meaning that is an apsolute shit ton of things to break