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38mm Top End Tapered Button Bit for Hard Granite
Rock GradeHardness LevelTypical RockF gradeApplicable button bitIThe hardestthe hardest and compact quartz, basalt and other special hard rocksf=20The best qualityIIstrong hardvery hard granite&quartz porphyry&siliceous schist, hard quartz, the hardest sandstone &limenstone rockf=15The b
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36mm Best Quality Taper Button Bit for Bore Hard Rock
Drill bit diameter Taper(°)(mm)(in)281 3/326,7301 3/166,7321 1/46,7,11,12341 11/326,7,11,12351 3/86,7,11,12361 13/326,7,11,12381 1/26,7,11,12401 9/166,7,11,12411 5/86,7,11,12421 21/326,7,11,12431 11/166,7,11,12451 3/46,7,11,12501 31/326,7,11,12602 3/86,7,11,12Thread button bit connection:Drill b
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40mm 8 Tooth Taper Carbide Alloy Button Drill Bit
Rock GradeHardness LevelTypical RockF gradeApplicable button bitIThe hardestthe hardest and compact quartz, basalt and other special hard rocksf=20The best qualityIIstrong hardvery hard granite&quartz porphyry&siliceous schist, hard quartz, the hardest sandstone &limenstone rockf=15The b
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38mm 8 Tooth 12 Degree Tapered Drilling Bit
Rock GradeHardness LevelTypical RockF gradeApplicable button bitIThe hardestthe hardest and compact quartz, basalt and other special hard rocksf=20The best qualityIIstrong hardvery hard granite&quartz porphyry&siliceous schist, hard quartz, the hardest sandstone &limenstone rockf=15The b
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38mm 8 Tooth Tapered Hard Alloy Drill Bit for Mining
Rock GradeHardness LevelTypical RockF gradeApplicable button bitIThe hardestthe hardest and compact quartz, basalt and other special hard rocksf=20The best qualityIIstrong hardvery hard granite&quartz porphyry&siliceous schist, hard quartz, the hardest sandstone &limenstone rockf=15The b
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40mm Tapered 7 Degree Button Bit for Boring Holes
Rock GradeHardness LevelTypical RockF gradeApplicable button bitIThe hardestthe hardest and compact quartz, basalt and other special hard rocksf=20The best qualityIIstrong hardvery hard granite&quartz porphyry&siliceous schist, hard quartz, the hardest sandstone &limenstone rockf=15The b
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High Quality DIN345 Taper Shank Drills, HSS
Size(mm)Size(mm)6.0-11.956.0-57.012.0-12.958.0-60.013.0-13.961-6314.0-15.564-6515.6-16.066-6716.1-16.968-7017.0-17.971-7518.0-18.976.019.0-19.977.020.0-20.978.021.0-21.979.022.0-22.980.023.081.023.0-24.982.025.0-25.983.026.0-26.984.027.0-27.985.028.0-28.986.029.0-29.987.030.0-30.988.031.0-31.589.031
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40mm 7 Ball-Tooth Tapered Bore Bit for Rock Drill
Rock GradeHardness LevelTypical RockF gradeApplicable button bitIThe hardestthe hardest and compact quartz, basalt and other special hard rocksf=20The best qualityIIstrong hardvery hard granite&quartz porphyry&siliceous schist, hard quartz, the hardest sandstone &limenstone rockf=15The b