This Krino Cobalt HSS Twist Drill Bit is supplied in retail packaging with a hanging hook. It has the following specification:
Diameter: 4mm
Working Length: 43mm
Overall Length: 75mm
Krino Cobalt HSS Twist Drill Bits are ground from the solid with 5% cobalt (Co). The added 5% cobalt improves the red hardness (heat resistance) of the drill bit and results in significantly extended life.
The 130° self-centring split point for drilling into alloy steel, cast iron, stainless steel and metals up to R = 1200 N/mm². Produced in accordance with DIN 338 for high precision tolerances and geometric accuracy.