NENZ rotary hammer,the full range of products in the company have been completed in the highly professionally integral R&D and testing center, and pass the strictest property tests and the detection of simulated real-operation environment. All products have passed International Quality Management System ISO9001, TUV, UL and 3C Certifications. Qualification team's design, rigorous quality management system and harsh environment tests make NENZ's full-range products reach the international top level in the similar industry.