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Drill Tools 3 Wing Water Well Drilling Tungsten Carbide Step Drag Bit. High Efficiency & Wear Resistance: Forged high-quality alloy steel with PDC cutter inserts for longest lifespan. Wide Size Range: Available in sizes from 2'' to 17 1/2'' for various drilling needs. Customization Available: Special sizes available by sample or drawing; OEM/ODM supported. Fast Delivery: Regular models in stock; mass production within 15 workdays. Versatile Application: Suitable for oil, gas, water wells, and HDD in soft to very hard formations.