Guided by scientific and technological innovation, SONC always keeps outward-oriented and sticks to the positive development on the basis of technological innovation. leather chappal making machine We have been investing a lot in the product R&D, which turns out to be effective that we have developed leather chappal making machine. Relying on our innovative and hard-working staff, we guarantee that we offer customers the best products, the most favorable prices, and the most comprehensive services as well. Welcome to contact us if you have any questions.The product has desired structural hardness. The quenching process of heat treatment has greatly enhanced metal toughness and hardness.