Product Name: 60 Degree Double Head Carbide Center DrillsModel Number: CD60-450/ ... Micro grain 0.6μ6. Type: Carbide center drills, Double head drills7. Flute: 2 Flute8. Helix angle: 35°9. ... center drilling on different metals, tip angle 30 degree, double head, also it can reduce the times of tool ... for standard carbide end mills such as Square type, Ball nose type, Corner radius type and Ali cutters, so ...