ShuangLi cutting tool factory is the largest manufacturer in South China, workshop is over 900 square meters, we focus on deep hole drilling process, gun drills produce and drilling accessories provider, the company founded in 2010, for years good reputation, our products have strong brand recognition among the famous company like Gree, Daikin, Hair, BYD auto, Honda, Bicom etc, ShuangLi deep hole drils key material, Tungsten Carbide is from Swiss, it was approved with excellent performance on drilling various hard metal parts. ShuangLi cutting tool factory stocks various sizes and lengths gun drills , all available for 1-2 days delivery, our deiveries accommodate all inventory needs. we offer gun drilling tip diameter spec range is 3.02mm to 45.02mm, in length can reach up to 4.5m, also customers can purchase special diameters and lengths outside of the realm of stock standards.We welcome customers worldwide tour our factory to know our products, to know our people, then to have a mutual Win.