Master Lock - Four (4) High Security Pro Series Padlocks w/8 Keys, 6121NKALJ-4 w/BumpStop Technology

★★★★★ 4.8 61 reviews

US$44.98
Price when purchased online
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US$44.98
Price when purchased online
Free shipping Free 30-day returns

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Product details

Management number 218573805 Release Date 2026/05/03 List Price US$44.98 Model Number 218573805
Category

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.

  • This listing is for four (4) High Security Keyed Alike Padlocks w/ 8 keys. ProSeries Padlocks are designed for Commercial/Industrial applications. Limited Life Time Warranty. The same lock is available with two shorter shackle lengths, search 6121NKALF and 6121NKA.
  • If you order two 4-packs they will not necessarily be keyed the same. To ensure 8 locks are keyed alike please order the 8-pack.
  • These locks feature the BumpStop Advanced Cylinder Technology. (for explanation see more product details below).
  • DIMENSIONS: 2-1/8 wide heavy steel body. A 5/16 diameter hardened boron alloy shackle with 2-3/16 inside height clearance.
  • Ideal for harsh outdoor conditions - exclusive Pro Series Weather Tough cover protects lock from water, ice, dirt and grime. Solid iron shackle shroud resists harsh physical attacks. The removable cylinder can be replaced or re-pinned. 5 spool pin tumbler cylinder for added pick resistance. Dual ball bearing locking mechanism resists pulling and prying.
Color Black
Lock Type Key Lock
Brand Name Master Lock
Unit Count 4.0 Count
Item Weight 2.58 Kilograms
Manufacturer Master Lock
Model Number 6121NKALJ
Material Type Alloy Steel
Control Method App
Controller Type Hand Control
Number of Pieces 4
Additional Features Keyless
Recommended Uses For Product Security
Manufacturer Warranty Description MASTER LOCK PRODUCT WARRANTY: Limited Lifetime Warranty. Master Lock Company LLC (Master Lock) grants the following warranty: If this product or any part of the product fails due to a defect in materials or workmanship at any time during the life of the product, Master Lock will, at its own discretion, repair or replace the product or part free of charge. Simply contact Master Lock at www.masterlock.com or 1.800.464.2088 for instructions on obtaining repair or replacement.

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