Rampa Inserts (Type SKD330) with hex drive, sealing collar and unthreaded lead.
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Size: 15mm or 18mm
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Diameter (D): 12mm
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Thread (d): 1/4-20 UNC
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Material: Steel, zinc plated
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Driver Size: 6mm
We recommend either the 10mm or 10.5mm Brad Point Bits by FAMAG depending on the hardness of material.