Quick Details Place of Origin: China (Mainland) , Brand Name: Senwell ,Type: Center Drill Bit, Material: Tungsten Carbide , Use: Well Drilling, Colour: red . Packaging Details: packing is according to customers' requirements , Delivery Detail: 0-35Days , Shipping: China main port (Tianjin & Shanghai for selection), Our Services 1.Advanced equipment and techniques 2. Customized design 3.High quality products and the best services to meet the strict needs of our customers 4Our business philosophy of "people-oriented, customer first and reliability first" 5. Long-term cooperative relationships with more than a hundred famous and large manufacturers in China 6. Successfully exported to Europe, America, the Middle East, South Africa and Southeast Asia 7.Warranty