Kett Tool makes different saw blades for almost any material you would consider cutting with one of their saws. Depending on your specific applicaiton, you can find blades for cutting Mild Steel up to 14 Gauge, Hard Aluminum, Soft Aluminum, Brass, Copper and Lead, Fiberglass, Plywood, Hardboard, Pressed Board, etc., Alliance Wall, Color Wall, Mirawal and similar single faced metal laminated panels, Plastics, plain as Lucite, Plexiglas and decorative laminates as Consoweld, Formica, Micarta, Texolite and Panelyte.
The Kett Tool Company was formed in 1940, as a manufacturer of specialty wood boring tools. World War II interrupted this program, when all of its production facilities were channeled toward the war effort. Working with the Armed forces and with aircraft manufacturers, KETT engineers developed a line of drilling and cutting tools for aircraft maintenance. After the war the design of the line was expanded to produce specialty tools for general industrial as wella s aircraft use. In 1970, Kett Tool purchased the Shear line out of Racine, Wisconsin and in 1996, purchased the Fenway Nibbler line. Kett Tool is currently producing a line of electric and pneumatic portable power saws, shears, and nibblers to cut a wide range of sheet materials used in many different applications and markets.
If you are not sure which Kett Saw Blade is right for you there is a good article on Coptool.com
"Selecting the Right Kett Saw" which should help.