HSS-AlCrN SPIRAL STEP DRILL BIT SET 3pcs 4-32mm

Made of high-speed steel, coated with aluminium chromium nitride, black oxide finish.
Spiral design allows for faster chip removal and reduces friction.
No pre-drilling needed.
Laser-marked engravings allow to control the size of the hole while drilling.
Used for processing non-ferrous metals, thin-walled steel sheets and plastics.
Cylindrical shank compatible with three-jaw drill chucks.
All in aluminium case.

Technical data:
Quantity: 3 pcs
Size: 4-12; 4-20; 4-32mm
Weight: 360 g