YINHAI 17 1/2 Milled tooth bits overview YINHAI Customer order--- 17 1/2" display YINHAI Production process workshop line 17 1/2" FAQ: 1.Q:Is your company a distributor or a manufacturer? A: Manufacturer,We are a 100% real factory of Rock Drill Bits, with 12 years' experience.  And We have passed the factory audited by SGS.2.Q:How  about the quality of your products? A :  All tricone bits(TCI) ,milled tooth bits and PDC bits produced strictly according to API standard and rock bits customized  in various construction drilling works are provided. 3.Q:What types of packing do you have? A:  Wooden boxes (free of fumigation); Packing and marks can be customized accroding to clients' requirements. 5.Q:What is the minimum order quantity for your factory  A: 1 pcs 6. Could you have techincal team for offering usages advices and after sales services? A: Yes