Solid carbide drills are a great option for excellent process security, manufacturing economy, and good hole quality. Internal coolant is always preferred to avoid chip jamming, especially in long chipping materials and when drilling deeper holes Spirial Chip Removal Groove Effective Prevention of Chip Accumulation Excellent Cutting Edge Design Make Tool Machining and Chip Removal More Stable Diameter from 3mm to 16mm Step by 0.1mm are Available