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    • Master Lock

    Master Lock: Tough-Under-Fire Security for Business and Industry

    Everyone knows the "Master Lock" name, but at Lock Depot, we focus on their Commercial and Industrial grade solutions. Beyond the standard retail padlock, we stock the ProSeries line, which is designed to withstand physical attacks and harsh environments. From high-security solid steel padlocks to Lockout/Tagout (LOTO) systems, Master Lock is the backbone of industrial safety.

    We specialize in large-scale Master Keyed and Keyed Alike padlock orders. Whether you need 500 padlocks for a school district or a custom LOTO system for a manufacturing plant, we can provide the specific cylinders and bitting you need. We carry the Master Lock 1500 series, No. 5 reinforced locks, and the Bluetooth Smart padlock line for keyless commercial access.

    PRO TIP: The "Weather-Tough" Cover

    If you're using padlocks on exterior gates or marine docks, standard laminated steel will eventually rust. Always look for the Master Lock ProSeries with a Weather-Tough cover. These feature a heavy-duty thermoplastic shell that protects the lock body and shackle from ice, grit, and moisture, extending the lock's life by years.

    Master Lock ships factory-new with custom keying available. We stock it at our warehouses across America — in before 2 PM EST, out the door same-day.

    Model Type Security Rating Best For
    No. 5 Reinforced Laminated Steel Commercial Grade General Commercial / Utility
    6121 ProSeries Weather-Tough Padlock High Security Outdoor / Marine / Industrial
    410RED Zenex Safety Lockout Padlock OSHA Compliant LOTO / Manufacturing / Electrical
    1500D Dial Combination Standard Schools / Gyms / Lockers
    Bluetooth Smart Keyless Electronic Commercial Grade Shared Access / Property Management

    Top Sellers

    • Shop Master Lock No. 5 Reinforced Laminated Steel Padlock
    • Shop Master Lock 6121 ProSeries Weather-Tough Padlock
    • Shop Master Lock 410RED Zenex Safety Lockout Padlock
    • Shop Master Lock 1500D Standard Dial Combination Lock

    Master Lock Resource Hub

    Master Lock Commercial FAQ

    Can I get Master Lock padlocks keyed to my house key?

    Yes. Master Lock offers several padlocks (like the ProSeries) prepped for Schlage C or Kwikset KW1 cylinders, allowing you to use one key for everything.

    What is "Bolt Cutter Tough" (Boron Carbide)?

    Master Lock uses Boron Carbide shackles in their professional lines. It is 50% harder than hardened steel and significantly more resistant to bolt cutter attacks.

    Are LOTO locks (Lockout/Tagout) different from regular padlocks?

    Yes. LOTO locks are usually made of non-conductive Zenex material and are designed to be "Key Retaining," meaning you cannot remove the key unless the lock is closed, ensuring the safety procedure is followed.

    • Master Lock 291 Keying Kit with Parts
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      Master Lock 291 Keying Kit with Parts

      Master Lock 291 Re-Keying Kit with Parts Features: Re-Keying kit contains extensive assortment of the most frequently used components. Rugged case with deep storage compartments. Convenient reference chart included. Re-Keying part refills may be ordered...
      MSRP: $94.59
      $81.07
      Add to Cart
    • Master Lock Box 5400D Master Lock Box 5400D
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      Master Lock Box 5400D

      Master Lock Box 5400D Features: Large Key Storage compartment holds over 5 house, car or padlock keys. 4 Dial Resettable Combination provides simple, set-your-own combination convenience. Key storage door pivots open smoothly and remains attached to...
      MSRP: $55.24
      $47.34
      Add to Cart
    • Master Lock Box 5401D Master Lock Box 5401D
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      Master Lock Box 5401D

      Master Lock Box 5401D Features: Large Key Storage compartment holds over 5 house, car or padlock keys. 4 Dial Resettable Combination provides simple, set-your-own combination convenience. Key storage door pivots open smoothly and remains attached...
      MSRP: $51.80
      $44.40
      Add to Cart
    • Master Lock 6125 with Keying Option Master Lock 6125 with Keying Option
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      Master Lock 6125 with Keying Option

        Master Lock 6125 Weather Tough Padlocks Features: 2-3/8" (61mm) wide laminated steel body for superior strength. Hardened boron alloy shackle for superior cut resistance. High security solid iron shackle shroud resists harsh physical attacks...
      MSRP: $43.15
      $36.99
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    • Master Lock 6230 Solid Steel Padlock Master Lock 6230 Solid Steel Padlock
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      Master Lock 6230 Solid Steel Padlock

        Master Lock 6230 Solid Steel Padlock Features: 2-1/2" (64mm) wide, hardened solid steel body. Hardened boron alloy shackle for superior cut resistance. 5 spool pin tumbler cylinder for added pick resistance. Removable cylinder can be replaced or...
      MSRP: $42.33
      $36.29
      Add to Cart
    • Master Lock 1481DAT Towing Security - Keyed Alike Locksets
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      Master Lock 1481DAT Towing Security - Keyed Alike Locksets

      The Master Lock No. 1481DAT Has a 5/8in stainless steel receiver lock with an adjustable coupler latch lock. The receiver lock includes the famous Push to Lock™ locking mechanism, its easily used by pushing the lock body firmly onto the pin and...
      MSRP: $39.58
      $33.93
    • Master Lock 230 Re-Keyed Padlock Master Lock 230 Re-Keyed Padlock
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      Master Lock 230 Re-Keyed Padlock

      Master Lock 230 Re-Keyed Padlock The Master Lock 230 Solid Body Padlock series features a 2-1/2in wide solid zinc lock body that is strong, durable and resists corrosion. This is ideal for industrial applications, a rekeyable 5-pin W27 cylinder provides...
      MSRP: $38.70
      $33.17
      Add to Cart
    • Master Lock 175LH Master Lock 175LH
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      Master Lock 175LH

      Master Lock 175LH Padlock Features: 2" (51mm) wide body. Set-your-own combination convenience. Resettable to any of 10,000 personalized combinations. 2-1/4" shackle. Shackle Dimensions: 5/16" x 2-1/4" x 1".
      MSRP: $28.70
      $24.60
      Add to Cart
    • Master Lock 94DSPT Resettable Gun Lock Master Lock 94DSPT Resettable Gun Lock
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      Master Lock 94DSPT Resettable Gun Lock

        Master Lock 94DSPT Gun Padlock Features: Easy to attach lock trigger access is blocked until lock is removed. Features positive locking with adjustable ratchet mechanism. Offers added convenience of a keyless resettable combination. Special...
      MSRP: $19.68
      $16.87
      Add to Cart
    • Master Lock 90DSPT Gun Padlock Master Lock 90DSPT Gun Padlock
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      Master Lock 90DSPT Gun Padlock

      Master Lock 90DSPT Gun Padlock Features: The world standard in trigger lock design. Steel and zinc body for maximum durability. Durable metal construction. Protective rubber pads shield gun from scratching or marring. Fits many handguns, rifles and...
      MSRP: $16.96
      $14.54
      Add to Cart
    • Master Lock 107DSPT Gun Lock
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      Master Lock 107DSPT Gun Lock

        Master Lock 107DSPT Gun Lock   California-approved firearms safety device that meets the requirements of California Penal Code Section 12088 and the regulations issued thereunder.   PLEASE CHECK AVAILABILITY ON KEYED ALIKE...
      MSRP: $17.08
      $13.19
      Add to Cart
    • Master Lock 1534D Resettable WORD Combination Lock
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      Master Lock 1534D Resettable WORD Combination Lock

      Master Lock Padlock 1534D 2-1/2" Wide Set Your Own "WORD" Combination Padlock with Interchangeable, Removable Dials; Assorted Colors Features Easy to set and to reset - use letters, numbers, symbols or mix them up Interchangeable dials are removable...
      MSRP: $15.33
      $13.14
      Add to Cart
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