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 Drill bit Set 1.5mm-13mm M35 Carbide Drill bits 5% Cobalt Twist Drill HSS 13-Piece Set Metric Drill bits Set for Metal (13pcs)

Product ID: 517130635

Details

Cutting angle string
135° Degrees
Cutting diameter
1.5
Finish type
Titanium or or
Material
Cobalt
Shank type
Round

📏13 precision metric sizes (1.5-6.5mm)

⚙️5% Cobalt for superior hardness

🛠️135° double-edge spiral cutting

AR$53262

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Sold byAmazon ArgentinaDelivered byDesertcartCustomer service byDesertcartReturns14 days · 30 with PRO

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Description

🛠️ Drill Like a Pro, Finish Like a Boss!

ORGANIZED ON THE GO - Compact plastic case with clear size markings keeps your set ready and accessible wherever work calls.
UNMATCHED DURABILITY - 5% cobalt alloy boosts heat resistance and lifespan beyond standard drill bits.
PRECISION AT EVERY SIZE - 13 meticulously graduated metric bits cover all your metalworking needs from 1.5mm to 6.5mm.
VERSATILE METAL MASTERY - Engineered for stainless steel, cast iron, copper, aluminum, and more—your go-to for professional and DIY projects.
EFFORTLESS CUTTING POWER - 135° double-edge spiral design ensures clean, fast drilling with minimal surface friction.

This 13-piece M35 cobalt drill bit set features 5% cobalt-enhanced HSS bits ranging from 1.5mm to 6.5mm, designed for high durability and heat resistance. Ideal for drilling through tough metals including stainless steel and cast iron, the 135° double-edge spiral cutting ensures precision and efficiency. Packaged in a compact, labeled storage case, it’s perfect for both professional tradespeople and serious DIYers seeking reliable, long-lasting performance.

Specifications

ASIN	B0B8WYPBMF
ASIN	B0B8WYPBMF
Best Sellers Rank	#26,612 in Tools & Home Improvement ( See Top 100 in Tools & Home Improvement ) #118 in Power Drill Bit Sets
Brand Name	COPOUIXR
Country Of Origin	China
Country of origin	China
Customer Reviews	4.6 4.6 out of 5 stars (315)
Customer reviews	4.6 4.6 out of 5 stars (315)
Cutting Angle String	135° Degrees
Cutting Diameter	1.5 Millimeters
Date First Available	15 September 2022
Finish Types	Titanium or Titanium Carbon with glossy or semi-gloss finish
Included Components	1.5mm-6.5mm Cobalt drill bit set
Item Dimensions	13.8 x 7.8 x 1.5 centimeters
Item Weight	0.1 Kilograms
Item model number	Cobalt twist drill bits 13
Manufacturer	COPOUIXR
Manufacturer	COPOUIXR
Material Type	Cobalt
Minimum Bore Diameter	1.5 Millimeters
Model	Cobalt twist drill bits 13
Number of Flutes	2
Number of Packs	1
Number of Pieces	13
Part Number	100002131
Point Style	Torsion Tip
Product Dimensions	13.8 x 7.8 x 1.5 cm; 100 g
Set Name	COPOUIXR Cobalt Twist Drill 1.5mm-6.5mm 13-Piece Set
Shank Type	Round
Surface Recommendation	Metal
Tool Flute Type	Spiral
UPC	797439784921
Unit Count	13 Count

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