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Profile: Luoyang Sinorock® Engineering Material Co., Ltd. is a manufacturer of self drilling anchor bolts. R thread self drilling hollow bar has a ISO standard thread, which has great anchoring effect and can be cut at any position according to demands. R thread self drilling hollow bar anchor is composed by hollow anchor bolt, anchor nut, anchor plate, anchor coupler, drill bit, centralizer, and the hollow anchor bars can be cut and lengthened by coupling on request. It can ensure the anchoring effect for complex ground conditions. It can be integrated with the functions of drilling, grouting and anchoring. Stainless steel self drilling anchor bolt is made of stainless steel materials. It is an alloy steel self drilling anchor bolt which can resist corrosion in air or chemical corrosion conditions.