how do I open the case, grrr!?

Hello There is a black disposable component in the upper left corner that can be used after destructively removed We are sorry that our products have caused you an unpleasant experience We will document this issue and will improve it Have a great life

do drill bits have etched "HSS Co"? or else how do you know they are Cobalt drill bits?

3mm-13mm have HSS*Co logo and size marking 1mm-2.5mm is too small to be marked, but also contains cobalt

what tolerances can I expect?

From the product manufacturing technology: The diameters are all standard sizes Drill length and cutting edge length may have small measurement errors with the solid From the perspective of use: Borehole diameter, face tolerances range from 0.01mm to 0.5mm, and the tolerance slowly decreases as the depth increases Cordless drill with maximum tolerance for handheld operation Table drill tolerances will remain below 0.1mm Hope this helps with your question

what is the cutting tip angle?

Tip angle 118 ° This is the best angle for the cobalt twist drill. The tip angle of all sizes of the set is 118 °. The new product can be used out of the box without trimming and grinding.

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Cobalt Metric Drill bits Set 1.5-6.5mm/13PCS High-Speed Steel Drill bit for Stainless Steel, Hard Metal, Cast Iron, Copper, Aluminum Plastic

Cobalt Metric Drill bits Set 1.5-6.5mm/13PCS High-Speed Steel Drill bit for Stainless Steel, Hard Metal, Cast Iron, Copper, Aluminum Plastic

Product ID: 489761278

Details

Cutting Angle String
135° Degrees
Cutting Diameter
1.5mm-6.5mm
Finish Type
Uncoated
Material
Cobalt
Shank Type
Straight

📏13 precision metric sizes 1.5-6.5mm

🔥135° cutting angle for high-speed drilling

⚙️5% Cobalt for superior hardness

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Sold byAmazon PanamaDelivered byDesertcartCustomer service byDesertcartReturns14 days · 30 with PRO

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Description

⚡ Drill Like a Pro, Finish Like a Boss!

PRECISION IN EVERY SIZE - Complete 13-piece metric set from 1.5mm to 6.5mm covers all your professional and DIY drilling needs.
VERSATILE METAL MASTERY - Perfectly drills stainless steel, cast iron, copper, aluminum, and even plastics—your all-in-one metal solution.
COMPACT ORGANIZED STORAGE - Durable plastic case with size labels keeps your bits secure, accessible, and ready for any project.
OPTIMIZED 135 CUTTING ANGLE - Double-edge spiral design reduces slipping and ensures clean, efficient drilling on hard metals.
UNMATCHED DURABILITY WITH 5 COBALT - Engineered for extreme heat resistance and long-lasting sharpness, outperforming standard bits.

This 13-piece Cobalt Metric Drill Bit Set features high-speed steel bits infused with 5% cobalt for enhanced hardness and heat resistance. With sizes ranging from 1.5mm to 6.5mm and a precision 135° cutting angle, these bits deliver superior performance on stainless steel, hard metals, cast iron, copper, aluminum, and plastics. Packaged in a compact, labeled storage box, this set is designed for professionals and serious DIYers seeking durability, precision, and versatility in one sleek kit.

Specifications

ASIN	B0B8WYPBMF
Best Sellers Rank	#55,343 in Tools & Home Improvement ( See Top 100 in Tools & Home Improvement ) #123 in Jobber Drill Bits
Brand Name	COPOUIXR
Customer Reviews	4.6 4.6 out of 5 stars (324)
Cutting Angle String	135° Degrees
Cutting Diameter	1.5mm-6.5mm Millimeters
Finish Types	Uncoated
Included Components	100002131
Item Dimensions	5.43 x 3.07 x 0.59 inches
Item Weight	0.1 Kilograms
Manufacturer	COPOUIXR
Material Type	Cobalt
Model	Cobalt twist drill bits 13
Number of Flutes	2
Number of Pieces	13
Part Number	100002131
Set Name	1.5mm-6.5mm
Shank Type	Straight
Surface Recommendation	Metal,Stainless Steel,Steel
Tool Flute Type	Spiral
UPC	797439784921
Unit Count	13.0 Count

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B/.39

Duties & taxes included

In stock

Sold byAmazon PanamaDelivered byDesertcartCustomer service byDesertcartReturns14 days · 30 with PRO

Buyer Protection · Full refund if your order doesn't arrive as described.

Desertcart purchases this item on your behalf and handles shipping, customs, and support to Panama.

Secure transaction

Trustpilot

TrustScore 4.5 | 7,300+ reviews

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