This is the ORIGINAL design which has been imitated. Acro Knife series come in two variations; one that is a mat finish and one that is semi-mirror which is a glossy finish. The Acro Knife resembles a knife due the unique design of the blade. The tenacious blades are for slide, wet, or dry cutting. The handle is designed to be “spoon-shaped” for ergonomic hold and feel. Cobalt, Molybdenum. The design is currently registered and pending.