12 1/4 IADC 537 Tricone Roller Cone Drill Bit. High-Efficiency Design: Forged from high carbon steel for wear resistance and high efficiency in drilling. Versatile Application: Ideal for soft to medium hard formations like shale, sandstone, and limestone. Customization Available: Supports customized machine types, processing types, and specific drilling requirements. Fast Delivery: Regular models in stock with prompt delivery; mass production depends on order quantity. Flexible Payment: Accepts various payment terms including L/C, T/T, D/P, and PayPal. Global Export Experience: Exported to over 20 countries including USA, Australia, and European nations. Professional Manufacturer: Established in 2016 with 101-200 employees and 5 R&D engineers. Convenient Logistics: Located near Beijing and Tianjin ports for economical and fast inland transportation.