Does it make a good key chain?

Yes, my husband and I have used it as a keychain for the past 2-3 years and it works great. Very lightweight and keeps keys quite organized. My only reservation is that for some reason the black locking mechanism on mine slide around every now and then and my keys fall off when in my purse or pocket. My husband hasn't experienced the same issue. husband hasn't had this issue so maybe I just due to the fact that my keys are in my black hole of a purse and faces much more abuse. I've since taken some pliers to expand the narrow hinge part of the carabiner and no long have the issue. Anyway, we think it works great.

Which size is good for keys? 2 or 4?

The #2 will be better for one or two keys. The #4 will be better for about 5 or 6 keys.

What is the size difference between the 2 and 4? Is it available in a waterproof version here on Amazon?

The 2 is tiny, you can attach maybe a couple of keys and a small Swiss Army knife. The 4 is a solid keyring, can get a ton on there. I don't see how solid metal with powder coating wouldn't be waterproof already...

No. This item is not waterproof and will rust over time if exposed to too much water. We do have a marine grade stainless steel version that stands up to water better but is not intended to be left in water for long periods of time.

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Nite IZE Unisex's S-Biner Steel Slide Lock

Product ID: 5169266

Details

Brand
Nite Ize
Color
Stainless
Item Weight
0.3 Ounces
Material
Stainless
Shape
S-Shape

🔑Secure key retention

🔒Dual independent slide locks

🛡️Premium stainless steel strength

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¥1771

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Sold byAmazon JapanDelivered byDesertcartCustomer service byDesertcartReturns14 days · 30 with PRO

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Description

🔐 Secure your essentials with style — because your keys deserve the best lock in town!

LOCK IT DOWN TWICE OVER - Dual gates with independent slide locks keep your valuables ultra-secure.
UPGRADE YOUR EVERYDAY CARRY - Ditch bulky keychains for a modern, professional-grade locking carabiner trusted by thousands.
BUILT TO LAST STYLED TO IMPRESS - Sleek stainless steel construction combines durability with minimalist design.
SLIM PROFILE MAXIMUM CONVENIENCE - Compact 2" x 0.9" size fits effortlessly on belts, bags, or pockets without bulk.
EFFORTLESS ACCESS ZERO COMPROMISE - One side locks your keys tight, the other side stays free for quick clipping on the go.

The Nite Ize S-Biner Steel Slide Lock is a premium dual-gate carabiner crafted from durable stainless steel. Featuring independent slide locks on each gate, it securely holds keys or gear on one side while allowing quick attachment on the other. Compact and lightweight, it’s designed for professionals who demand both security and sleek everyday carry solutions.

Specifications

ASIN	B00BKVPTWM
Best Sellers Rank	#24,650 in Sports & Outdoors ( See Top 100 in Sports & Outdoors ) #148 in Accessory & Keychain Carabiners
Brand Name	Nite Ize
Color	Stainless
Customer Reviews	4.6 4.6 out of 5 stars (907)
EU Spare Part Availability Duration	1 Years
Global Trade Identification Number	00094664026704
Included Components	Unit^Instruction Guide
Item Dimensions L x W	2"L x 0.9"W
Item Type Name	Nite Ize LSB2-11-R3 S-Biner SlideLock Dual Locking Carabiner, Size #2, Stainless
Item Weight	0.3 Ounces
Lock Type	Wire Lock
Manufacturer	Nite Ize
Material Type	Stainless Steel
Shape	S-Shape
UPC	094664026704 783778722786
Unit Count	1.0 Count
Warranty Description	Warranty

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¥1771

Duties & taxes included

In stock

Sold byAmazon JapanDelivered byDesertcartCustomer service byDesertcartReturns14 days · 30 with PRO

Buyer Protection · Full refund if your order doesn't arrive as described.

Desertcart purchases this item on your behalf and handles shipping, customs, and support to Japan.

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