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Zhejiang Leqing Andong Tools Co ., Ltd ., founded in 1998, is a wholly - owned enterprise specializing in the production of hole openers nationwide . The company is located at the southern foot of the famous Yandang Mountain 。 The company adheres to the strategy of quantity and high - level , introduces advanced production and testing equipment from both domestic and foreign sources , and establishes a complete set of product quantity assurance systems to ensure the reliability of product quality . The company has developed a variety of new varieties and specifications of various hole opener series products , with the main products being T C . T ultra hard alloy hole opener , stainless steel alloy hole opener , HSS high - speed steel alloy hole opener ,M42 bimetallic hole openerWe have a variety of hole drilling machine series , including TCT premium ceramic drills , woodworking hole drilling machines , and can produce various special specifications of products according to customer