The Bathtub Safety Rails are made of high quality PVC that is very lightweight but durable at the same time. Installation is as simple as clamping it down and no tools are needed to secure it in place. The clamp grips the edge to the tub securely without making any scratches or unwanted marks once you remove it. The assist bar is an attractive white colour which is aesthetically pleasing and was styled to perfectly fit for your needs. The bath rails clamp attaches by turning the locking mechanism which tightens the secure grip pads on all bath tub contact points. The pads prevent scratching of the tubs surface and ensure a secure fit.