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 lubrication for longer life

🔷15 precision sizes 6-50mm

NZ$40

Duties & taxes included

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Sold byAmazon New ZealandDelivered byDesertcartCustomer service byDesertcartReturns14 days · 30 with PRO

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Description

💎 Drill like a pro, shine like a diamond!

MULTI SURFACE MASTERY - Seamlessly cuts through glass, tiles, bottles, stone, and more — your all-in-one toolkit essential.
PREMIUM DIAMOND COATING - Engineered for sharpness and durability on glass, ceramic, marble & granite.
SATISFACTION GUARANTEED - Backed by a dedicated support team ready to ensure your flawless drilling experience.
VERSATILE 15 SIZE RANGE - From delicate 6mm to robust 50mm, drill perfect holes for every project.
OPTIMIZED COOLING DESIGN - Large clearance holes ensure smooth water flow and chip removal for effortless drilling.

The YLYL 15-Piece Diamond Drill Bit Set offers a comprehensive range of 6mm to 50mm sizes with industrial-grade diamond coating, designed for precision drilling on hard surfaces like ceramic, glass, marble, and granite. Featuring a water-lubrication-friendly design with large clearance holes, it ensures durability and smooth operation. Perfect for professionals and DIY enthusiasts seeking clean, accurate holes with long-lasting performance.

Specifications

ASIN	B08MCG68XG
Best Sellers Rank	#9,478 in Tools & Home Improvement ( See Top 100 in Tools & Home Improvement ) #8 in Hole Saw Sets & Kits
Brand Name	YLYL
Customer Reviews	4.3 4.3 out of 5 stars (4,120)
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	15.0 Count

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