18mm 30° Countersink Diamond Drill Bit, 5pcs – 30 Grit, 6mm Shank for Stone, Glass & Tile

The 18mm 30° Countersink Diamond Drill Bit, 5pcs is a heavy-duty, fast-cutting countersinking and beveling tool engineered for stone, glass, ceramic, and tile. Featuring an aggressive 30 grit electroplated diamond coating on a rigid 6mm shank with a 30-degree cone angle, this 5-piece set is ideal for deburring holes, creating steep chamfers, and enlarging holes without cracking or chipping delicate materials.

• Head Diameter: 18mm
• Cone Angle: 30°
• Grit: 30 Grit extra coarse diamond for aggressive cutting
• Shank Diameter: 6mm standard drill / rotary shank
• Quantity: 5-Pack (5 pieces)
• Bond Type: Electroplated diamond
• Applications: Edge beveling, hole deburring, countersinking, and hole enlarging on granite, marble, stone, tile, ceramic, and glass

For best cutting performance and tool longevity, always operate with water coolant or lubrication.