We are Wenzhou Welldrill M&Electric co., LTD . located at WenZhou City, ZheJian Of China Is a professional manufacturer more than 7 years specializing in PDC Anchor Shark Drill Bits Series ;PDC Coal Mine Bits Series; Diamond Core Drill Bits Series ect. Our products can widely used in geology and mineral exploration, water development and roads, railways, bridges, housing, construction, core-pulling experience bored through solid rock range. with good stability quality, long life , fast drilling speed advantage.can be got into the soft, hard ground, and broken complex formation. We sincerely hope to explore cooperation opportunities with you, believe in the good faith reputation, and get the basis of mutual benefit togather.