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Venzio 4-Digit Combination Bike Chain Lock, 4mm, 3 ft

$10.99 (Price correct as of 11/13/2026 12:38 PST · Product prices and availability are accurate as of the date/time indicated and are subject to change. Any price and availability information displayed on Amazon at the time of purchase will apply to the purchase of this product.)

The Venzio combination chain lock has a 4-digit settable and resettable code, a 4mm steel chain, and a 3 ft (900mm) length. Its polyester sleeve covers the chain, and the lock core is zinc alloy. The listing names bicycles, e-bikes, scooters, strollers, fences, and gates as possible uses. Check that the length fits your locking setup, and remember that the listing cautions against leaving a bicycle locked outside for long periods.

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SKU: B0FK4JVXHJ Category:

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Quick Summary

The Venzio 4-digit combination chain lock has a 4mm steel chain and a 3 ft (900mm) length. It is keyless, and the code can be set and reset. The listing describes it for bicycles, e-bikes, scooters, strollers, fences, and gates.

Key Details

Detail Product information and buyer relevance
Lock type Chain lock with a 4-digit combination, so it does not use a key.
Chain Steel, 4mm thick. This describes the chain size, not a tested security rating.
Length 3 ft (900mm). Check that the chain can reach around the item and a suitable fixed object in your intended setup.
Cover Polyester fabric sleeve around the chain.
Lock core Zinc alloy.
Color and quantity Black; one lock.

What to Compare Before Buying

  • Reach: Compare the 3 ft length with the route around your bicycle or other item and the object you plan to secure it to.
  • Chain size: The chain is 4mm thick. Do not treat this measurement as a guarantee of resistance to theft or cutting.
  • Code operation: The code is settable and resettable. Check the product instructions for the exact setting and resetting procedure.
  • Use context: Consider how long the item will be left unattended and the security conditions where it will be parked.

Important Limitations

The listing cautions against leaving a bicycle locked outside for long periods, especially in high-crime areas, and notes that no bike lock is completely secure. This lock’s chain thickness and combination mechanism do not establish a particular security grade or level of theft protection.

Before You Decide

Confirm that 3 ft provides enough reach for your intended locking point, that a 4mm chain suits your requirements, and that you are comfortable using a combination rather than a key.

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