Shenzhen Zhi Zong Si Hai Technology Co., Ltd. is a brand company which specialized in the paintless dent repair tools , automotive dent repair technical training and technical franchising . Our company set the research and development , production and sales as one , committed to developing the various repair tools which will not hurt the original paint and are easy to operate . Our company is strong in technology and have our own laboratory as well as development team , not only mastered the advanced technology and strict production process management and perfect quality assurance , but also got a number of national R & D patents .