Product introduction self-drilling anchor bolt is made of seamless steel pipe with thick wall and perfect thread shaping technology, with an alloy bit at the anchor head; it is easy to cut through various rocks. Specification: Model No: GY25 ... - Update: 2012-05-22

Product introduction: Grouted hollow anchor bolt embodies anchor body, drilling bit, stopper, arch plate and nut as a whole. which is characterized by seamless steel pipe with thick wall and perfect thread shaping technology ,Combined the functions ... - Update: 2012-05-22