Master Lock - Four (4) High Security Pro Series Padlocks 6121NKALJ-4 w/BumpStop Technology

(577 Reviews)

Price
$99.21

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(70000 available )

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11 Ratings
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Reviews
  • Marin

    > 24 hour

    Good value

  • Carmen Vargas

    > 24 hour

    It are so good

  • Carmen Vargas

    > 24 hour

    It are so good

  • Marin

    > 24 hour

    Good value

  • Eddie Carter

    > 24 hour

    These are some solid locks that are weather protected. They work great on my toy hauler and other trailers.

  • R. Schilling

    > 24 hour

    And smooth locking/sliding mechanism. Well built. Only just received but SHOULD hold up in wet humid Southeast Louisiana.

  • Jabler

    > 24 hour

    Very nice locks. The mechanism is finely machined. One reviewer commented that you need to pull the lock open. I believe this is only due to the water/dust cover that fits so snug. I sprayed a heavy dose of silicone lubricant into the key hole. Not one drop came out around the shackle. When I turned the lock right side up, about 2 ml of lubricant fluid poured out through the key slot.

  • Jabler

    > 24 hour

    Very nice locks. The mechanism is finely machined. One reviewer commented that you need to pull the lock open. I believe this is only due to the water/dust cover that fits so snug. I sprayed a heavy dose of silicone lubricant into the key hole. Not one drop came out around the shackle. When I turned the lock right side up, about 2 ml of lubricant fluid poured out through the key slot.

  • Bill Goldthwaite

    > 24 hour

    These locks are great quality and the keyed alike feature makes them even better.

  • R. Schilling

    > 24 hour

    And smooth locking/sliding mechanism. Well built. Only just received but SHOULD hold up in wet humid Southeast Louisiana.

FEATURING BumpStop TECHNOLOGY - Lock bumping a surprisingly simple method of breaking in through locked doors and padlocks - is undoubtedly the newest emerging threat to personal property security. And virtually all locks in use today are particularly vulnerable to bumping. Until now. BumpStop Advanced Cylinder Technology employs an innovative, patent pending design which utilizes a unique reverse rake tapered driver pin, high performance springs and tightly machined cylinder chambers. During a bump attempt, this design prevents the transfer of force from the bump key to the pins and therefore blocks rotation of the cylinder so that the lock remains locked.

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