This M16‑thread diamond core drill bit fits standard angle grinders, supporting both dry‑cut and wet‑cut drilling.Optimized hard‑welded diamond segments bring fast drilling speed and outstanding wear resistance.The thickened steel‑tube body is shock‑proof and not easy‑to‑deform when drilling concrete, cement wall, red brick and masonry.Precise M16 screw interface guarantees firm installation.Widely used for pipeline hole opening, wall punching and construction renovation. Custom length and OEM service are available.