20mm 240 Grit Diamond Countersink Drill Bit – 6mm Shank, 90° for Stone, Glass & Tile

The 20mm 240 Grit Diamond Countersink Drill Bit (90° Angle, 6mm Shank) is a fine-finishing 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.

• Head Diameter: 20mm
• Angle: 90° conical chamfer
• Grit: 240 Grit fine diamond for smooth, chip-resistant finishes
• Shank Diameter: 6.0mm rotary shank
• Bond Type: Electroplated diamond
• Applications: Precision hole beveling, fine edge chamfering, edge cleanup, and countersinking in granite, marble, tile, ceramic, and glass

For best results and extended tool lifespan, use with water lubrication or coolant during drilling.