Does this fit a 1/2” drill?

I don't quite understand what you mean. Do you need a 1 / 2 inch M35 cobalt drill? Yes, we have 12.7mm, which is 1 / 2 inch in English.

is this good for 10mm rivet nuts?

I do not think so...since 10M rivet nuts have an od larger than the 10M screw it will facilitate. Here is how I know i.e. 1,2,3,4,5,6,7,8,9,10...etc. 10 is higher (larger diameter) than 8.9mm. You can search for a chart that will help you determine the size bit you need. It will be in the neighborhood of12mm I expect. Be sure to get someone to help you drill the holes if you can't hold the drill plumb.

Confused by your size chart. Is the dia. of your 10.5 bit 10.5 or 9.6-10.5?

Not sure what chart indicated 9.6-10.5 mm. The bit shown in the listing should cut a hole of 10.5 mm with little error. What gets confusing for some is when a drilled hole is to be threaded (tapped). A smaller hole is needed and requires a smaller drill bit size than the bolt size/thread that must screw into the threaded hole. Hope I did not confuse you more.

What is the length, how deep will it drill?

Total length 117mm, blade length 75mm

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5mm メトリック M35 コバルト鋼非常に耐熱性ツイストドリルビット 2個ストレートシャンク付きステンレス鋼や鋳鉄などの硬質金属を切断 5%コバルト M35グレード HSS-CO

5mm メトリック M35 コバルト鋼非常に耐熱性ツイストドリルビット 2個ストレートシャンク付きステンレス鋼や鋳鉄などの硬質金属を切断 5%コバルト M35グレード HSS-CO

Product ID: 765175769

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Details

Material
M35コバルトハイス鋼
Finish Type
チタン
Shank Type
ビット
Cutting Angle String
135 Degrees
Brand
LingGan

💨Dual Flute Design - Fast chip removal

🔥135° Point Angle - Precision & speed

⚙️M35 5% Cobalt Steel - 10x lifespan

Description

⚡ Drill Smarter, Last Longer – The Pro’s Choice for Hard Metal Mastery

SECURE STABLE FIT - Straight shank design guarantees firm grip in standard chucks, minimizing slippage and maximizing control.
UNMATCHED DURABILITY - Crafted from M35 cobalt steel with 5% cobalt, delivering up to 10x longer life than standard HSS bits.
VERSATILE METAL MASTERY - Engineered to cut stainless steel, cast iron, copper, and aluminum with ease—perfect for demanding projects.
EFFORTLESS CHIP EVACUATION - Dual flute geometry rapidly clears debris, reducing heat and friction for cooler, faster drilling.
PRECISION DRILLING EVERY TIME - 135° split point ensures accurate centering and clean, chatter-free holes in hard metals.

This 5mm M35 cobalt high-speed steel drill bit set features 5% cobalt for exceptional hardness and heat resistance, delivering up to 10 times the lifespan of typical HSS bits. Its 135° split point and dual flute design ensure precise, fast, and clean drilling in tough metals like stainless steel and cast iron. Finished with a titanium coating for enhanced durability, these bits fit securely in standard chucks, making them ideal for professional-grade metalworking tasks.

Specifications

Manufacturer	LingGan
Part number	20-20-11-27-12-55
Item Weight	20 g
Product Dimensions	8.6 x 0.5 x 0.5 cm; 20 g
Size	5mm
Finish	チタン
Material	M35コバルトハイス鋼
Number Of Pieces	2
Batteries Included	No
Batteries Required?	No
Item Dimensions LxWxH	8.6 x 0.5 x 0.5 cm

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