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Diameters: 89mm，102mm，115mm，127mm，152mm
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Diameters: 89mm，102mm，115mm，127mm，152mm
Threads: ：T51 ST58 ST68
Design features: concave face, 9 gauge buttons, conventional spherical buttons
LHS Rock Tools, striving to pursue high-quality of drilling tools
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1. shank rod Hex22 x 108mm, R25 thread, L: 600mm