Can I use this on stone like hard river rock?

So far I have only used it on glass and clay/ceramic. I would strongly advise if you do try it, use water to help with the friction. It says that you can use it on stone , gemstones, rocks, and pebbles. Hopefully that answers your question

what is the chuck size 3/8 or 1/2 , I have 3/8 inch chuck?

I have a dewalt drill with 3/8 in chuck its perfect.

What maximum thickness are these suitable for? What is the thickness of the diamond dust on the smallest three cutters?

I can't tell you in exact dimensions how thick the coating of the cutters are. I can tell you that I cut a hole through a substantial hi-power electrical insulator big enough to run a 120-v plug through. Before using these bits-nothing could touch the ceramics it was made of. The secret to success is to run water on the project while drilling.

What machine can i buy for the drill bits?

and drill will work, cordless or corded

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

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15 Pcs Diamond Drill Bits for Ceramic, Diamond Hole Saw Drill Bit Set Kit, Premium Glass Drill Bit for Bottles,Pots, Marble, Granite Stone, Tile Cutting 0.23 Inch - 2 Inch（6mm - 50mm） YLYL

Product ID: 265814889

Details

Brand
YLYL
Cutting Diameter
6 millimeters
Finish Type
Diamond
Material
Ceramic Marble
Shank Type
Straight

💎Industrial-grade diamond coating

💧Water cooling optimized

🔷15 precision sizes 6-50mm

KD 4.41

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Description

💎 Drill like a pro, cut like a boss!

COOL CLEAN CUTS - Large clearance holes allow water cooling for smooth, chip-free drilling
PREMIUM DURABILITY - Industrial-grade diamond coating ensures long-lasting sharpness
SATISFACTION ASSURED - Trusted by thousands with 4.3-star rating and dedicated support
VERSATILE SIZE RANGE - 15 drill bits from 6mm to 50mm cover every project need
MULTI SURFACE MASTERY - Effortlessly drills glass, ceramic, marble, granite & more

The YLYL 15-Piece Diamond Drill Bit Set offers a comprehensive range of sizes (6mm to 50mm) crafted with industrial-grade diamond coating for superior durability and precision. Designed for professional and DIY use, it effortlessly drills through tough surfaces like ceramic, glass, marble, and granite. Its water-cooling optimized design ensures clean, chip-free holes, making it a must-have for any serious craftsman or manager looking to elevate their toolkit.

Specifications

ASIN	B08MCG68XG
Best Sellers Rank	#7,172 in Tools & Home Improvement ( See Top 100 in Tools & Home Improvement ) #5 in Hole Saw Sets & Kits
Brand Name	YLYL
Customer Reviews	4.3 4.3 out of 5 stars (4,155)
Cutting Diameter	6 millimeters
Finish Types	Diamond Coating
Manufacturer	YLYL
Material Type	Ceramic,Marble,Glass,Stone,Diamond
Minimum Bore Diameter	0.31 inches
Model	YLYL011
Number of Flutes	1
Number of Pieces	15
Part Number	YLYL011
Point Style	Diamond Point
Set Name	YLYL 15-Piece Diamond Drill Bit Set
Shank Type	Straight
Surface Recommendation	Ceramic, Glass, Porcelain
Tool Flute Type	Straight
UPC	739944296209
Unit Count	15 Count

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