Solid Carbide DrillsHolemaking Solid Carbide Drills DLC, DLN for Universal, Mini Hole Drilling High Performance Hight Productivity Hight Stability Features ‧Internal coolant design ‧Unique UNIX coating improves tool life ‧Optimized flute improves drilling efficiency ‧Customized available ‧Diameter 0.18 ~ 3.0mm B018