Delta Folding Potato Masher by Joseph Joseph Conventional mashers can be awkward to store due to their long handle and mashing head that are fixed at right angles to each other. Delta solves this problem as the head can be neatly folded flat after use. Before using, simply lock the mashing head in position with the small sliding collar located on the shaft. After use, slide the collar back up the shaft and secure it at the base of the handle. As well as being easier to store, Delta is also more efficient to use. Its curved mashing plate is designed to fit better into the edges of a pan, which means more potato is squashed with each plunge of the masher. Suitable for non-stick cookware.