Spiral tool introduces solid tungsten carbide micro drills. These drills are made from imported high-grade, ultra sub micro grain solid tungsten carbide blank. It also includes micro drills, straight flute drills, common shank drills with through hole coolant, step drills, flat drills with steps, special drills as per customers drawing, and special application drills. The diameter of drills varies from 0.14 mm to 42.0 mm with accuracy in closest tolerance and also suitable coating to enhance the tool lifetime.