
Industrial-Grade Tapered Rock Drill Bits for Durable Foundations. Durable Material Composition: Body made of AISI4140/42CrMo with Tungsten Carbide tips for abrasive soil. High Hardness Performance: Hardness reaches HRC40~44 ensuring long service life in frozen ground. Wide Compatibility Range: Compatible with PFC-2, 201, 211, 299, SZ210, SZ211, and other taper fit models. OEM and ODM Services: Full customization, minor customization, and design-based customization available. Strict Quality Control: 100% visual inspection by packing staff before delivery. ISO9001 Certification: Manufacturing process certified under ISO9001:2000 standards. Fast Delivery Time: 7 to 21 days delivery upon receiving deposit. Comprehensive After-Sales: Technology support provided; returns or replacements for quality issues.