XMEIFEI PARTS Drill bit Set Tools M35 Cobalt Drill Bit Set,HSS-CO Drill Set 1.0-10MM, for Drilling on Hardened Steel, Cast Iron Stainless Steel Long Drill bits (Size : 1mm 10pc)

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Grinding bit both accuracy and life are better than copper bit; Especially toughness increase several times, high strength and machining operations is not easily broken!
Material: Cobalt Steel Alloys
Use: Metal Drilling
M35 Cobalt Drill Bit Set,1.0-10MM, for Drilling on Hardened Steel, Cast Iron and Stainless Steel
Following size for you to choose :
10PC X 1.0MM
10PC X 1.5MM
10PC X 2.0MM
10PC X 2.5MM
10PC X 3.0MM
10PC X 3.5MM
10PC X 4.0MM
10PC X 4.5MM
10PC X 5.0MM
10PC X 5.5MM
10PC X 6.0MM
10PC X 6.5MM
5PC X 7.0MM
5PC X 7.5MM
5PC X 8.0MM
5PC X 8.5MM
5PC X 9.0MM
5PC X 9.5MM
5PC X 10.0MM

Features:
M35 material,includes 5% cobalt, the best drill bit set you've got , top quality ,stable performance and durable.
Ideal for drilling on hardened steel, stainless steel, cast iron.
135-degree split-point tip starts drilling immediately with less force and eliminates "walking" across the work surface.
Cobalt steel extends cutting edge life and maintains cutting life after resharpening.
Extra hard drill for greater wear.