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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Description

🔐 Lock in your security, unlock your freedom.

COMPACT YET MIGHTY - 2-inch wide lock body fits gym lockers, gates, and sheds with ease.
SET YOUR OWN COMBO - Personalize your 4-digit code for ultimate convenience and security.
ALL WEATHER DURABILITY - Solid zinc body built to withstand rain, sun, and outdoor elements.
CUT RESISTANT STRENGTH - Hardened steel shackle resists cutting and sawing attempts.
TRUSTED LIFETIME PROTECTION - Backed by Master Lock’s Limited Lifetime Warranty for peace of mind.

The Master Lock 178D is a versatile, weather-resistant combination padlock featuring a solid zinc body and a hardened steel shackle. Its customizable 4-digit code offers thousands of combinations, making it perfect for gym lockers, gates, and sheds. Compact yet robust, it delivers reliable security backed by a Limited Lifetime Warranty.

Specifications

Brand	Master Lock
Special Feature	Resettable Combination Lock
Lock Type	Combination Lock
Item dimensions L x W x H	1.3 x 2.01 x 3.31 inches
Material	Zinc
Recommended Uses For Product	Security
Style	Combination Lock, 1 Pack
Color	Black
Number of Pieces	1, 4, 8
Finish Type	Polished
Included Components	1 padlock
Controller Type	Hand Control
Shape	Square
Item Weight	4.8 ounces
Control Method	App
UPC	354123436162
Model Name	Set Your Own Combination Lock
Manufacturer	Master Lock
Part Number	FBA_178D
Product Dimensions	1.3 x 2.01 x 3.31 inches
Item model number	178D
Is Discontinued By Manufacturer	No
Size	1 Pack
Finish	Polished
Pattern	Combination Lock
Item Package Quantity	1
Special Features	Resettable Combination Lock
Batteries Included?	No
Batteries Required?	No
Warranty Description	Limited Lifetime Warranty

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