What is "pastry blender"

A pastry blender or pastry cutter is a kitchen tool used to mix a hard (solid) fat into flour in order to make pastries. The tool is usually made of narrow metal strips or wires attached to a handle, and is used by pressing down on the items to be mixed (known as "cutting in"). It is also used to break these fats (shortening, butter, lard) into smaller pieces.