GLONG is specialized in metal solution: Raw material: bars(steel, stainless steel, non-ferrous, iron), matrixed crude, forged or cast, rolled circular cutting, laser, foundry. Trade and produce(screws, hold peel-off, joint, clear, gable, connection, machinery part. Stamping, bending, mortising, knurling, marking, engrave, grinding, lapping, stitching, cutting. Thermal treatment: cementing, tempered, nitriding, stabilization, tempering HF. Surface Treatment: Galvanized, plating, painting, phosphating, oxidation, anodizing, nickel plating, chromium, anti-rust.