HOLEMAKER STEP DRILL SPIRAL FLUTE, 9 STEPS, 3MM STEP LENGTH, 4-20MM

The Titanium Nitride coating significantly increases the tool life by providing the following benefits:.
Increased surface hardness to 85HRC.
Ceramic surface, reducing friction by up to 30%.
Especially resistant to cold welding.
Suitable for cutting a wide range of materials

Sizes: 4, 6, 8, 10, 12, 14, 16, 18, 20mm
Step Length: 3.0mm
Overall Length: 74.5mm
Shank Diameter: 8mm