These replacement razor blades are completely plastic free and designed for use with any safety razor, no matter the style of the opening! These superior platinum double edge blades fit snugly in your razor, giving you the closet shave and smoothest skin time and time again. The added benefit of the traditional safety razor is the gap between the blade and the frame, allowing hairs to escape the head of the razor, rather than getting stuck like disposable heads. Making the change from disposable razors and razor heads to a metal razor will dramatically cut down your plastic use throughout your lifetime. Even buying these blades you will see how much plastic and waste is saved!