After trying cheap bits from China I decided to try these bits which are a bit more expensive but worth the money. I've had a 1mm bit for cutting aluminum rod for 12 hours and it still works like a charm.
Autotoolhome High-Speed Steel Straight Cutter
7 Review
SpeTool 5Pcs/Set Flat Nose Double Flute Carbide End Mill 1/32" Cutting Dia Router Bits Cutter CNC Machine Tools For Carbon Steel Soft Alloy Steel Die Steel Tool Steel Cast Iron Wood
11 Review
Electric lawn mower Makita ELM3720, 1400 W, 37 cm
54 Review
πͺ AFUNTA 4-Flute 0.08" Milling Bits
7 Review