Does this work under water?

Yes David. It's a simple, yet reliable design. Worth the money for sure.

Does this pen break laminated glass

Yes this will break laminated windshield/side window glass. However the plastic sheet inside the glass will still be intact so you will still need a windshield saw. This tool would be best used to give you a "purchase point" on windows of this type.

Does it break regular glass windows

If by "regular glass" you mean untempered glass, then yes, of course it will. Ordinary glass is easily broken by almost anything. However, you will get some very large and sharp shards by breaking ordinary glass. Breaking tempered glass results in a pile of what looks like pebbles with sharp edges. Practically harmless, all said and done.

Is this a pen or can it be added to keys?

It isn't a pen and comes with a keyring. I actually need to reorder one since I lost the keys I had it attached to.

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

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Zak Tool No. 57K Key Ring Window Punch, Anodized Aluminum, Classic, Cranberry

Product ID: 5669754

Details

Brand
Zak Tool
Color
Black
Item Weight
2.4 ounces
Material
Alloy Steel
Product Dimensions
2.8"L x 7.3"W

🔩Alloy steel durability

🧰Compact & portable design

🪓Effortless window breaking

Description

🚨 Break barriers, save lives—carry the Zak Tool No. 57K everywhere!

EVERYDAY CARRY READY - Includes a pocket clip and fits standard 1" keyrings for instant accessibility.
COMPACT LIGHTWEIGHT - At just 2.4 oz and 2.8 inches long, it fits seamlessly on your keyring or gear.
PRECISION WINDOW PUNCH - Breaks car windows cleanly and quickly—your go-to lifesaver in emergencies.
RUGGED ALLOY STEEL BUILD - Engineered for strength and longevity in high-stress rescue scenarios.
CORROSION RESISTANT WITH CARE - Anodized aluminum finish plus easy maintenance tips keep it rust-free and reliable.

The Zak Tool No. 57K Key Ring Window Punch is a compact, anodized aluminum rescue tool designed for quick, efficient window breaking. Crafted from durable alloy steel, it weighs just 2.4 ounces and measures 2.8 inches, making it perfect for everyday carry on keyrings or gear. Trusted by first responders, it features a pocket clip and corrosion-resistant finish, ensuring reliability in critical moments.

Specifications

ASIN	B00131VU86
Best Sellers Rank	#545,420 in Tools & Home Improvement ( See Top 100 in Tools & Home Improvement ) #610 in Hole Punches
Brand Name	Zak Tool
Color	Black
Customer Reviews	4.4 4.4 out of 5 stars (312)
Hole Count	2
Included Components	Pocket Clip
Item Dimensions L x W x H	2.8"L x 7.3"W x 0.85"H
Item Weight	2.4 ounces
Manufacturer	Zak Tools
Material Type	Alloy Steel
Model	89000
Number of Items	1
Number of Packs	1
Operation Mode	Manual
Part Number	ZT-57K
Sheet Count	30
UPC	819673010397 971475949333
Unit Count	1 Count

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