What is the diameter of the shaft? Will it fit in a standard pin vise?

Diameter of the shaft is 1/8" or .125

Can I put these in a dremel tool?

Absolutely, but you have to remember these are extremely brittle. ANY side force will break the bit. You are best served using them in some sort of press but with very steady hands and a thoughtful method, operating by hand is possible.

can these be use by hand twisting on brass jets in carburetors to enlarge the one increiment at a time?

I'm going to say yes. I twist them by hand, but I should also mention that I'm drilling into wood. I build model ships. Drilling into brass might be possible, but be aware that these bits, although very effective drilling into wood, are very brittle. I can't tell you how many have snapped on me when I least suspect it and I have to break out another set. I've learned to drill carefully and with patience. Other than that, I do like these bits and have started using them in my Dremel.

Are these recommended for drilling into raw semi-precious stones (like Crystal Quartz, amethyst, agate etc) for the purpose of creating pendant holes?

No. You really need a diamond bit or hole saw, depending on the size. You'll also want to have a water drip going or at least use some sort of lubricant such as beeswax or gem lube.

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50pcs PCB Drill Bits Set Spiral Flute Carbide 0.3mm-1.2mm for Print Circuit Board Stone Dremel Jewelry CNC Engraving (5pcs each)

Product ID: 564080750

Details

Brand
WayinTop
Finish type
White
Item dimensions L x W x H
10 x 5 x 0.5
Material
Tungsten Steel
Shank type
ビット

📏0.3mm-1.2mm multi-size range

🔩Tungsten steel durability

⚙️50pcs precision drill bits

20781 Ft

Duties & taxes included

In stock

Sold byAmazon HungaryDelivered byDesertcartCustomer service byDesertcartReturns14 days · 30 with PRO

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Description

🔧 Drill Like a Pro, Finish Like a Boss!

READY FOR ANY PROJECT - Versatile enough for circuit boards, 3D printer nozzle cleaning, amber beeswax, and plexiglass engraving.
PRECISION IN EVERY SPIN - 10 sizes from ultra-fine 0.3mm to robust 1.2mm cover all your micro-drilling needs with surgical accuracy.
ENGINEERED FOR ENDURANCE - Crafted from high-hardness tungsten steel, these bits resist wear and bending, ensuring long-lasting performance.
SMART STORAGE ON THE GO - Packaged in durable white plastic cases for easy transport and damage protection—never lose your edge.
CLEAN CUTS NO COMPROMISE - Sharp cutting edges and spiral flutes deliver smooth, glitch-free drilling on PCBs, jewelry, and CNC projects.

This 50-piece PCB drill bit set features tungsten steel bits in 10 precision sizes (0.3mm to 1.2mm), designed for high wear resistance and clean, efficient drilling. Ideal for professionals and hobbyists working on circuit boards, CNC engraving, jewelry, and more, it comes in protective cases for easy storage and transport.

Specifications

ASIN	B07S636JHY
ASIN	B07S636JHY
Best Sellers Rank	#177,874 in Tools & Home Improvement ( See Top 100 in Tools & Home Improvement ) #720 in Power Drill Bit Sets
Brand Name	WayinTop
Customer Reviews	4.4 4.4 out of 5 stars (1,732)
Customer reviews	4.4 4.4 out of 5 stars (1,732)
Date First Available	20 June 2019
Finish Types	White
Item Dimensions	10 x 5 x 0.5 centimeters
Item Weight	185 Grams
Item model number	WYTP21
Manufacturer	WayinTop
Manufacturer	WayinTop
Material Type	Tungsten Steel
Minimum Bore Diameter	0.3 Millimeters
Model	WYTP21
Number of Flutes	3
Number of Packs	10
Number of Pieces	50
Part Number	WYTP21
Point Style	Spear Point
Product Dimensions	10 x 5 x 0.5 cm; 185 g
Set Name	50pcs 0.3mm-1.2mm Carbide Spiral Helix PCB Drill Bit Set
Shank Type	ビット
Surface Recommendation	Metal
Tool Flute Type	Spiral
UPC	713871273991 713871270419
Unit Count	50.0 Count

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20781 Ft

Duties & taxes included

In stock

Sold byAmazon HungaryDelivered 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 Hungary.

Secure transaction

Trustpilot

TrustScore 4.5 | 7,300+ reviews

Meera L.

Smooth transaction and product arrived in perfect condition.

3 weeks ago

Vikram D.

The MOLLE sheath is of exceptional quality. Very happy with my purchase.

2 weeks ago

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