A set of 3 replacement blades and safety wrench. These are fixed blades and will fit all versions of the Tennis Ball Cutter™.   These blades do not require assembly and pierce the tennis ball more easily and, therefore, with less effort.  Just spin the blade in, using the included wrench, and you are ready to go.  Remember, your Tennis Ball Cutter will cut 1000+ tennis balls before the blades need replacing.   Shipping and handling for these blades is included in the price.