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choose of reinforced concrete - pure concrete - hard concrete - abrasive concrete |
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JVS 3-parts laser welded with fastening 5/4" x 400mm Performance: D132/10m D82/8m D32/7m |
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After weared 3-part drills simply exchange TOP part. Performance MIDDLE=aprox.5 TOP |
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Silver retyping for large size and atypic drills are made by silver brazing. |
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drill use for dry for wall electric box. Has center HS drill. Legth 120mm, fastening cylinder/ M14. |