If you've started shopping for bathroom grab bars, you've probably noticed they don't all look the same — and that's not just a design choice. A grab bar's shape determines how well it supports your body during specific movements, like stepping over a tub wall, lowering onto a toilet seat, or steadying yourself on a wet shower floor. Choosing the wrong style, or the wrong grab bars and rails combination, can mean the bar simply isn't there when you actually need to grab it. I