When you need reliable performance for large-diameter holes in masonry and concrete, Danyang Ebuy's SDS Core Drill Bit delivers exceptional results. Our enterprise-grade drilling solution features premium 40Cr alloy steel construction with YG8C Tungsten Carbide teeth rated at 89+ HRA hardness. With our 77,000 square meter facility and 319 skilled employees producing 150,000 pieces daily, we ensure consistent quality and rapid delivery. Each product undergoes precise heat treatment (HRC 48-52 shank hardness) and maintains strict concentricity tolerances under 0.5mm for professional applications requiring diameters from 30mm to 160mm.