Dongguan hongda Company is the professional company developing and manufacturing PMMA, PC plates, and cutting tools for windows lenses. All its tungsten-steel heads are made of the Swiss wear-resistant ultrafine particles tungsten-steel that is specialized for cutting PMMA and PC materials; and the raw diamonds consist of South African natural diamonds and PCDs (Poly-Crystalline Diamond); therefore, the products of the company enjoy the service life as long as 14-16 hours, and the diamond heads could last more than 60 hours. To ensure the accuracy, those above products are applied for the 6-axis CNC tool grinder made by Swiss Techno swiss machines Company.