A pastry wheel is a tool which is used to cut, shape, or mold pastry. Pastry wheels come in a number of forms, from cutters which are designed to produce uniform strips of pastry to pie crimpers. Some companies even make pastry wheels with removable inserts, allowing bakers to choose from a number of options.
Generally, a pastry wheel consists of a handle which can be mounted to an axle which may hold something like a blade for cutting or a rotary crimper for producing a neat, uniform edge. The best pastry cutters have large, soft handles which make them easy to hold and use, and most are designed to be run through the dishwasher, reducing the risk of a buildup of butter and other pastry products.