OSG Flat Bottom Carbide Drill - Through Coolant 3xD - EGIAS Coated - 7.00mmThe OSG Flat Bottom Carbide Drill with Through Coolant is engineered for precision flat bottom drilling in steel and alloys. With a 7. 00 mm diameter, a 3xD length ratio, and an EGIAS coating, its built for high speed, durable performance in demanding applications. Diameter: 7. 00 mm Geometry: Flat bottom drill configuration for precise bottom relief Through Coolant: Through coolant design for efficient cooling and chip evacuation Length ratio: 3xD