THUAN THIEN INVEST DEVELOPMENT IMPORT EXPORT TRADING COMPANY LTD. is one of producing small screws in Vietnam with good quality in Drywall Screw, Tile Screws, Roofing Screw^Standard and special materials are produced from a number of specialized suppliers who guarantee the highest quality standards.We are technologically the world's leading manufacturer of high-strength fasteners and a competent partner for the development and production of complex cold-formed parts. We set standards in the areas of innovation, quality, and profitability.Our in-house Quality Assurance division monitors these materials through the various production processes, including Heat Treatment and Plating. Mechanical and dimensional tests are carried out using the latest Tensile Testing and product verification methods.Components are produced to meet various ISO and international specifications and certified documentation is supplied on request.We are technologically the world's leading manufacturer of high-strength fasteners and a competent partner for the development and production of complex cold-formed parts. We set standards in the areas of innovation, quality, and profitability.