RT Material Factory is a professional manufacturer of construction hardware and security items such as door closer, doorstop, doorbell, hinge, ip camera, security alarm and other products. Our products have a complete system to strictly control the quality. All products have undergone multiple inspections to ensure that every process of the finished product inspection is under the control of the inspectors and has obtained quality certificates: CE, RoHS, FCC.We have the ability and confidence to provide customers with various products with stable quality, timely supply and sufficient supply. Adhere to cost-effective, professional services to promote our high-quality cooperation.