HOLEMAKER STEP DRILL SPIRAL FLUTE, 13 STEPS VARIED STEP LENGTH, 7-40.5MM

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: 7, 10.5, 12.5, 14.5, 16.5, 18.5, 20.5, 23.5, 25.5, 30.5, 32.5, 38.5, 40.5mm
Step Length: 3.0mm
Overall Length: 115mm
Shank Diameter: 12mm