Profile: Hebei Jiufu Industrial and Mining Parts Co., Ltd. is a manufacturer specializing in the supply of supporting materials for coal mining, construction engineering and large-scale concrete projects. It mainly produces self-drilling bolts, friction bolts, glass fiber reinforced plastic solid bolts, post-tensioning bar, resin bolts and other coal mine engineering supports. Self drilling anchors are special type of rod anchors. Self-drilling anchor consists of a sacrificial drill bit, hollow steel bar of the appropriate outer and inner diameter and coupling nuts. The anchor body is made of a hollow steel tube with an outer round thread. Steel tube has the sacrificial drill bit at one end and the corresponding nut with a steel end plate.