
Factory Reverse Circulation Drill Bits 89mm RC Hammers for Mining. Customized Color Options: Available in Gold or customized colors as per customer request. Patent-Designed Bits: Replaceable bits allow drilling different sizes without sample contamination. High Abrasive Resistance: Carburizing treatment ensures durability in hard rock and loose soil conditions. Easy Maintenance Design: Simple internal structure and integrative collection tube allow replacement without disassembly. Versatile Drilling Application: Suitable for mining, tunneling, quarrying, construction, and civil engineering projects. Customizable Package: Ply-wooden cases and pallets available, with customization for special requests. Experienced Manufacturer: Over 20 years of industry experience with dedicated R&D team led by Dr. Zhao Mingchun. OEM & ODM Support: Accepts OEM and ODM orders with requirements or design drawings provided.