Heavy duty steel rule dies are ideal for cutting thicker tougher materials. The Steel blades are held in place by high density plywood. To maintain tight tolerances all of the plywood is processed using our laser cutting machinery. The blade thickness typically runs between .056 and .112 inches. With the use of these stronger blades, dies can easily be made to cut materials that are 3 inches thick or greater. Serrated knives can be used for particularly strong materials like kevlar or fiberglass.