70mm 240 Grit Diamond Countersink Drill Bit – 6mm Shank, 90° for Stone, Glass & Tile

The 70mm 240 Grit Diamond Countersink Drill Bit (90° Angle, 6mm Shank) is a fine-finishing large-diameter hole chamfering, beveling, and deburring tool engineered for stone, glass, ceramic, and tile applications. Featuring high-grade 240 grit electroplated diamond abrasive on a sturdy 6mm cylindrical shank, this bit provides smooth, chip-free edge refining, creates clean conical countersinks for flush fasteners, and pre-polishes hole perimeters.

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• Head Diameter: 70mm
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• Angle: 90° conical chamfer
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• Grit: 240 Grit fine diamond for smooth, chip-resistant finishes
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• Shank Diameter: 6.0mm rotary shank
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• Bond Type: Electroplated diamond
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• Applications: Precision large hole beveling, fine edge chamfering, edge cleanup, and countersinking in granite, marble, tile, ceramic, and glass
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For best results and extended tool lifespan, use with water lubrication or coolant during drilling.