With strong R&D strength and production capabilities, JM Hardware now has become a professional manufacturer and reliable supplier in the industry. All our products including triangular screw are manufactured based on the strict quality management system and international standards. triangular screw We will do our best to serve customers throughout the whole process from product design, R&D, to delivery. Welcome to contact us for further information about our new product triangular screw or our company. makes triangular screw even more perfect than before.