One of our client are automobile gearbox manufactory with producing capacity 200,000 sets annually .They consumed USD 5,000,000 for gear cutter hob and pinion shape cutter. 60% ceramic coating gear cutter hob import from Japan and Germany. Price at USD1250. Max grinding 12 times after each grinding work less than100 pieces if without coating process。 With our coating process Max grinding 30 times after each grinding work at least 350 pieces. We saved USD 2,500,000 for our client.