Does this lock have any harmful chemicals Prop 65

Don’t put it in your drink or cook with it, if it mixes into your drink or food it could make you sick but I believe the report said you’d have to do that 834 times to have a negative affect on you. But on a side note I read just the paper from the Prop 65 rule could make you violently sick if you eat all the paper in just one setting.

Is it for outdoor use?

It hasn't fared well for us. We have an older one which held up for about 3 years before needing to be replaced. The lifetime warranty allows you only one replacement, so it really isn't a lifetime warranty at all. If you live near the beach, consider yourself lucky if it works for 2-3 years. That said, it is for outdoor use, just expect to lubricate frequently especially after rain or if you live near saltwater.

What's the diameter of the shackle? I need to make sure it can fit through a hole in a security box.

5/16"http://www.allpadlocks.com/cgi-bin/ez-catalog/product_images.cgi?account=X380790;product_id=M178;image=images%2Fcatalog%2F178sketch.jpg

Lost the change key -- how to reset the combo without it?

you can just use a small screwdriver to push in and change the combo while doing so. The Key really just holds down the bar inside for you.

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Alloy_Steel Set-Your-Own Polished Combination Padlock, Die-Cast, Black

Product ID: 81247863

Details

Brand
Master Lock
Item dimensions L x W x H
33 x 51 x 84
Lock Type
Combination
Material
Alloy Steel
Special Feature
Cut Resistant

📏compact 2-inch body

🔒4-digit customizable combo

🛡️cut & weather resistant

Description

🔐 Lock in your security, unlock your peace of mind.

COMPACT YET MIGHTY - 2-inch polished lock body fits perfectly on lockers, gates, and gym bags without bulk.
SET YOUR OWN SECURE CODE - Personalize your 4-digit combo for ultimate convenience and security.
BUILT TO WITHSTAND THE ELEMENTS - Die-cast alloy steel body and hardened shackle resist cutting and weather damage.
EFFORTLESS RESET WITH INCLUDED TOOL - Change your combination anytime with the easy-to-use reset key—no locksmith needed.
TRUSTED QUALITY PROVEN PERFORMANCE - Master Lock’s iconic durability backed by 14,000+ rave reviews and a 4.6-star rating.

The Master Lock 178D is a polished, die-cast alloy steel combination padlock featuring a customizable 4-digit code and a hardened steel shackle for superior cut resistance. Designed for both indoor and outdoor use, its compact 2-inch body offers robust protection for lockers, gates, and gym equipment. Weather-resistant and easy to reset with the included tool, this lock combines convenience with trusted durability, making it a top choice among professionals and security-conscious millennials alike.

Specifications

ASIN	B0009V1WMA
Additional Features	Cut Resistant, Weather Resistant
Best Sellers Rank	#27,598 in Home Improvement ( See Top 100 in Home Improvement ) #40 in Combination Padlocks
Brand Name	Master Lock
Colour	Black
Connectivity Protocol	Wi-Fi
Controller Type	Combination control
Customer Reviews	4.6 4.6 out of 5 stars (14,022)
Included Components	1 padlock
Item Dimensions	33 x 51 x 84 Millimeters
Item Type Name	Set Your Own Combination Lock
Item Weight	136 g
Lock Type	Combination Lock
Manufacturer	Master Lock
Manufacturer Part Number	FBA_178D
Manufacturer Warranty Description	no warranty available
Material Type	Alloy Steel
Model Name	Set Your Own Combination Lock
Model Number	178D
Number of Items	1
Number of Packs	1
Number of Pieces	1, 4, 8
Product Finish Type	Polished
Recommended Uses For Product	outdoor , indoor
Shape	Square
Style Name	Classic
UPC	354123436162

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