About Us We are the experts in waterjet and stamping. Why Choose JK Prototype, inc. With our qualified personnel and equipment, we can handle your waterjet and stamping needs. We Offer We Guarantee We Provide Quality on time services We put our years of experience behind every job. At JK Prototype, Inc., we can cut almost any material and in whatever design, shape or size that you require. We can handle your needs from stamping to waterjet and machining complete.