I ordered this set but it came as a much cheaper set in a weak, brittle case. Is this what is being sent now, or was this just a shipping mistake?

Mine came in a clear plastic case with a black plastic divider section. Not the greatest however I needed the bits to work, not the case.

I want to drill 8 to 10 holes through large, stainless steel hinges (3mm thick).Could I do the job with these drills?

Probably but you will need the right cutting fluid . I did not use this bits on SS yet. Thank you GOOGLE: "What can you use to cut stainless steel fluid? As a manufacturer of metal processing oil, we recommend MORESCO BS-6M soluble cutting fluid, MORESCO BS-9 soluble cutting oil. WILL CM-128 semi-synthetic cutting oil, WILL CH-370 semi-synthetic cutting fluid. These cutting oils are especially good on stainless steel, and provide excellent performances during machining."

Unfortunately I could not find a country of manufacture this company. They are inexpensive bits, and I've had good luck with them.

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Fully operational. Shipping worldwide, on schedule.Customs & duties included in the price

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Cobalt Drill Bit Set 6mm - 10pcs, M35 Twist Drill Bits Straight Shank, 6mm High Speed Steel Drill Bits for Drilling in Hard Metal, Stainless Steel, Cast Iron

Product ID: 506698801

Details

Material
Cobalt Steel
Cutting Diameter
6 Millimeters
Finish Type
Gold Oxide
Shank Type
Straight
Cutting Angle String
135 Degrees

B/.77

Duties & taxes included

In stock

Sold byAmazon PanamaDelivered byDesertcartCustomer service byDesertcartReturns14 days · 30 with PRO

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Details

Material
Cobalt Steel
Cutting Diameter
6 Millimeters
Finish Type
Gold Oxide

Description

Cobalt Drill Bit Set 6mm - 10pcs, M35 Twist Drill Bits Straight Shank, 6mm High Speed Steel Drill Bits for Drilling in Hard Metal, Stainless Steel, Cast Iron

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