Alpen Cobalt 4 Drill Bit, 50 mm.

Alpen cobalt 4 drill bit, 50 mm. -Diameter: 4.5mm. -Self-centering due to its specially sharpened tip. -Tolerance up to 600º c.  From thermal stress. -Due to its special sharpening, it allows easier drilling with a pressure of up to 50% lower than normal. -Suitable for construction steels, alloy steels, stainless steel, copper, brass, aluminum and plastic. -Made with cobalt, which is a very hard material, which provides great resistance to breakage and high temperatures.