Winstrol is pretty much only used for cutting. It helps maintain muscle mass while promoting fat loss. It also improves muscle "hardness", vascularity, and unlike some other steroids you won't retain water while on winstrol. It's these properties and the fact that it doesn't convert to estrogen that make winstol a popular steroid used by athletes and bodybuilders prior to a competition. If your looking to put on muscle mass or size your better off choosing something else.