DYWI® Drill Self-Drilling Bolt - DSI Underground Systems
The self-drilling DYWIDAG hollow core anchor is a fully threaded hollow bar that initially serves as a drill rod, utilizing a lost bit.
DSI Hollow bar, Self Drilling Bolt, bolt, Hollow core anchor, hollow bar, lost bit, grout, cement grouts, couplers, drill bits, grout sviwel, DSI Groundsupport, DSI, DYWIDAG
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