The JET Cobalt Super Premium Cobalt Jobber Drill Bits are heavy duty bits made for drilling hard tough metals: free machining stainless steel, high temperature alloys, titanium and certain plastics. Their high red hardness allow 30% higher drilling speeds over regular high speed steel drill bits.
- Razor sharp 135° split point self centering tips, eliminating “walking” and the need for center punching
- Superior bronze oxide (gold) ground flute finish reduces friction, translating to less operator pressure, and longer life
- Special flute form enhances chip ejection, reduces drill retractions (woodpeckering) and improves coolant flow to the tip
- For best results use in rigidly held positive feed drilling equipment