What size is the shank? Will they fit a 1/4inch drill?

The shaft of the diamond bit is just a bit bigger than a 1/4 like 5/16 if that’s what you are asking. Must use a drill that is adjustable to accept the round shaft.

Will it work on an alluminum 1/8" sheet?

Hello, Diamond hole saw will not work on alluminum. Maybe carbide burr set will work on alluminum.

Can these work on wood? I have an old rusted screw that snapped off inside a chair leg.

Not likely. These bits are like a hole saw - an empty shell that cuts on the outside diameter only. Get a screw extractor bit for that size screw, chuck it in power drill, set drill to reverse and let it go into the screw and remove it automatically.

Can I use to drill hole ~ an inch or two wide on mirrored glass?

No, it not going to work. Must be a drill designed for glass.

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Diamond Drill Bits Set, 10 PCS Diamond Hole Saw Set, Glass Drill Bit for Ceramic Tile Porcelain Marble Granite Stone Bottles

Diamond Drill Bits Set, 10 PCS Diamond Hole Saw Set, Glass Drill Bit for Ceramic Tile Porcelain Marble Granite Stone Bottles

Product ID: 456579267

Details

Cutting angle string
6E+1 Degrees
Cutting diameter
40.64
Finish type
Nickel
Material
Marble Glass
Shank type
[A] Threaded

💎Diamond-coated for ultra-precision

🔩10 versatile hole saw sizes

🛡️Corrosion-resistant nickel plating

Description

💎 Drill Like a Pro, Cut Like a Boss!

BUILT TO LAST - Upgraded carbon steel core with nickel plating resists corrosion and edge collapse.
ALL IN ONE SIZE RANGE - 10 drill bit sizes from 1/4" to 1-1/5" to tackle every project with ease.
COOL CLEAN DRILLING - Large clearance holes optimize water flow for extended bit life and effortless drilling.
PRECISION MEETS POWER - Diamond coating ensures razor-sharp, smooth cuts on the toughest surfaces.
VERSATILITY UNLEASHED - Perfect for glass, ceramic, porcelain, marble, granite, and even bottles—your go-to for hard surfaces.

This 10-piece Diamond Drill Bits Set features premium diamond-coated, corrosion-resistant carbon steel bits in a wide range of sizes, designed for precision drilling on glass, ceramic, porcelain, marble, granite, and stone. Engineered with large clearance holes for water cooling, it delivers smooth, clean cuts while extending bit life—ideal for professionals and DIY enthusiasts aiming for flawless results.

Specifications

ASIN	B0B24RXXDJ
Best Sellers Rank	#119,211 in Tools & Home Improvement ( See Top 100 in Tools & Home Improvement ) #239 in Hole Saws
Brand	Semderm
Brand Name	Semderm
Customer Reviews	4.4 out of 5 stars 2,096 Reviews
Cutting Angle String	6E+1 Degrees
Cutting Diameter	40.64 Millimeters
Cutting angle string	6E+1 Degrees
Cutting diameter	40.64 Millimeters
Finish Types	Nickel
Finish type	Nickel
Item Weight	1 Grams
Manufacturer	Semderm
Material	Marble, Glass, Nickel, Porcelain, Carbon Steel , Stone, Diamond
Material Type	Marble,Glass,Nickel,Porcelain,Carbon Steel,Stone,Diamond
Minimum Bore Diameter	6.35 Millimeters
Model	Semderm0001
Number of Flutes	2
Number of Packs	1
Number of Pieces	10
Part Number	Semderm0001
Point Style	Diamond Point
Set Name	Semderm Diamond Drill Bit Set (10 Piece)
Shank Type	[A] Threaded
Shank type	[A] Threaded
Surface Recommendation	Glass, Ceramic, Porcelain, Stone
Tool Flute Type	Straight
UPC	605500325624
Unit Count	10 Count

Reviews

R**M

Excellent bit set

Worked great cutting out holes on granite kitchen sink!! Clean smooth cut!!

19.09.2026

E**.

Great variety of drill bits.

Fast postage and great deal. The bits work really well.

14.02.2026

C**E

Did a great job with bathroom sink

Got these to expand a bathroom sink faucet hole to fit some faucet and this did the job easily, no damage at all after a few use and for the price it's well worth it. It will expand existing holes on ceramic with ease.

4.06.2026

G**L

Excelente

Brocas de excelente calidad y muy utiles

6.01.2026

J**.

Diamond cut drill bits

They work great. Very happy with my purchase.

9.11.2025

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