are these dies strong enough to mark keys?

yes,this number punch is strong enough to mark keys

What material hardness can i expect to use these (rockwell hardness c50, c40, c30, ...)?

hi,it is 40 chromium, hardness 55 degrees

Can these be heated with a butane torch and used to burn numbers into wood?

They are made if steel so I would say yes.

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

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SYPARTS TOOL YKLP 1/4" Metal Number Stamps Set, 6mm Steel Number Punch DIY for Leather, Brass, Aluminum, Mild Steel 9Pcs(0-9)

Product ID: 329705699

Details

Material
Alloy Steel
Colour
Silver
Brand
SYPARTS TOOL
Product dimensions
6.5L x 6W x
Item weight
381 g

🔢9 precision number stamps

⚙️6mm hardened carbon steel

🗃️durable storage case

¥8404

Duties & taxes included

In stock

Sold byAmazon JapanDelivered byDesertcartCustomer service byDesertcartReturns14 days · 30 with PRO

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Description

🔨 Stamp your mark, own your craft — don’t get left behind!

BUILT TO LAST - Crafted from high-strength carbon steel with differential heat treatment for unmatched durability.
COMPACT ORGANIZED - Comes in a sleek, hard plastic case designed for easy storage and on-the-go convenience.
MULTI MATERIAL MASTERY - Effortlessly imprint on leather, wood, brass, aluminum, and mild steel for all your creative projects.
PROFESSIONAL GRADE DIY - Perfect for jewelry makers, artisans, and pros who demand permanent, precise markings every time.
PRECISION AT YOUR FINGERTIPS - 9 crisp, clear number stamps (0-9) including reversible 6/9 for versatile marking.

The SYPARTS TOOL YKLP 1/4" Metal Number Stamps Set features 9 durable, 6mm carbon steel punches (0-9 with reversible 6/9) designed for permanent, precise imprints on a variety of materials including leather, brass, aluminum, and mild steel. Housed in a sturdy plastic case, this professional-grade kit is engineered for longevity and versatility, ideal for artisans and DIY enthusiasts seeking to personalize and elevate their projects.

Specifications

ASIN	B07GVL6NJ7
Best Sellers Rank	#56,373 in Arts, Crafts & Sewing ( See Top 100 in Arts, Crafts & Sewing ) #61 in Jewelry Metal Stamping Tools
Brand Name	YKLP
Color	Silver
Customer Reviews	4.6 4.6 out of 5 stars (374)
Hole Count	1
Item Dimensions L x W x H	2.56"L x 2.36"W x 25.59"H
Item Weight	13.44 ounces
Manufacturer	SYPARTS
Material Type	Alloy Steel
Model	SY201860327
Number of Items	9
Operation Mode	Manual
Part Number	SY201860327
Pin Hole Diameter	0.25 inches
Sheet Count	27

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TrustScore 4.5 | 7,300+ reviews

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