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Beyond the protection against rust, this hole also makes it possible to lubricate the inside of the padlocks in the event of a blockage. Over time, dust and dirt can build up inside, making the mechanism more difficult to actuate.
Maintenance tip: By injecting a few drops of lubricating oil (like WD-40) directly into this hole, you can ensure smooth operation and prevent your chains from getting stuck.
Padlocks designed to withstand the weather
If you use an outdoor chain and want to avoid corrosion, there are models that are specially designed to withstand extreme conditions. Some chains are made of stainless steel or covered with a special anti-corrosion coating, which makes them less sensitive to the effects of moisture and ensures better longevity.
Other everyday objects with hidden functionalities
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