① Grade
Carbide drill (Diameter of Cutting 2.0 to 2.55mm)
Carbide drill (Diameter of Cutting 2.6 to 3.0mm)
Carbide drill (Diameter of Cutting 9.1 to 10.0mm)
Carbide drill (Diameter of Cutting 3.1 to 3.5mm)
Carbide drill (Diameter of Cutting 3.6 to 4.0mm)
Carbide drill (Diameter of Cutting 4.1 to 5.0mm)
Carbide drill (Diameter of Cutting 5.1 to 6.0mm)
Carbide drill (Diameter of Cutting 6.1 to 7.0mm)
Carbide drill (Diameter of Cutting 7.1 to 8.0mm)
Carbide drill (Diameter of Cutting 8.1 to 9.0mm)