<a href ="http://www.sinorockco.com/product-details-151.html"><b>self drilling hollow bar</b></a> is a kind of bolt which has no casing pipe, drill pipe that can drilling and grouting in the broken rock, loose soil, such as Soft Rock，it adopts all threaded rod body,the drilling, grouting and anchoring features can be integrated ，with the construction convenient, reliable and efficient features. The surface of the rod through the formation of an international standard threaded processing, it can conveniently connect with the rig, anchor trolley, grouting and other standard drilling tools . In terms of product applications, Our company developed self drilling hollow bar as an effective method for complex geological conditions, loose, broken, vulnerable to collapse after drilling holes support engineering geology, applied to a large number of rock advance support radial support, slope support, excavation, roadway, soil nail wall, pull-back retaining wall and other surrounding rock bolt support engineering. Find much more information on our website: <a href ="http://www.sinorockco.com/product-details-151.html">http://www.sinorockco.com/product-details-151.html</a>
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