Fujian Riss Drilling Co., Ltd. is a legend in commercial production. It was founded by an enthusiastic engineer who devoted his energy and time to improving quality day by day. It has a larger production plant with an area of ​​20, 000 square meters and is a large company in Zhongshan with more than 300 employees and a daily production quantity of 1000 units of finished products. Our products include: Pdc Drilling Bit, Tricone Bit, Core Drills, Tapered Drill Bit, Factory Of Pdc Bit, Mill Tooth Bit, Pdc Cutter, Bit Pdc, Stone Core Drill Bits, Tricone Bit Sizes