A waterjet is an industrial tool capable of cutting a wide variety of materials using a very high-pressure jet of water, or a mixture of water and an abrasive substance. The term abrasive jet refers specifically to the use of a mixture of water and abrasive to cut hard materials such as metal or granite, while the terms pure waterjet and water-only cutting refer to waterjet cutting without the use of added abrasives, often used for softer materials such as wood or rubber.

Waterjet cutting is often used during fabrication of machine parts. It is the preferred method when the materials being cut are sensitive to the high temperatures generated by other methods. Waterjet cutting is used in various industries, including mining, automotive, medical, nuclear, agriculture, for cutting, shaping, and reaming.

Waterjet cutting is a versatile cutting technology; cutting nearly any material; Composites, Plastics, Metals, Glass, Stone or Rock, Ceramics, Rubber, Wood and many other materials. With the addition of a granular abrasive, a waterjet machine can perform quality cuts on materials up to 12 inches thick.