IRWIN IRW10507903 Glass & Tile Drill Bit 4mm The Irwin Glass & Tile Drill Bits are suitable for drilling glass porcelain and ceramics. Drill with low RPM (300RPM recommended) water cooling is also recommended. Do not use on hammer setting. Size 4mm
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IRWIN IRW10507903 Glass & Tile Drill Bit 4mm The Irwin Glass & Tile Drill Bits are suitable for drilling glass porcelain and ceramics. Drill with low RPM (300RPM recommended) water cooling is also recommended. Do not use on hammer setting. Size 4mm
