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1525 BLACK
Bulk Pricing:
Buy in bulk and save
Buy 100 - 249:
$6.51 each
Buy 250 - 499:
$6.42 each
Buy 500 - 749:
$6.34 each
Buy 750 or above:
$6.26 each
MSRP: $11.77
— You save $5.18



Master Lock No. 1525: Secure Combination Locker Padlock with Key Control is a 3-digit combination padlock designed for superior security for lockers, cabinets, and other storage applications.

Key Features

  • Superior Locker Security:
    • Patented BlockGuard® Anti-Shim Technology prevents tampering with the locking mechanism.
    • 3/4" tall hardened steel shackle resists cutting attempts.
    • Double-reinforced stainless steel body endures harsh environments.
  • Easy Management:
    • Key control feature allows supervisory access for master key holders.
    • Combination chart simplifies administration for multiple locks (sold in groups).
  • User-Friendly Design:
    • Easy 3-digit combination dialing with automatic scrambling for improved security.
    • Optional features include custom dials, colored dials, and back case printing for easy locker identification.

This versatile padlock is a perfect security solution for various indoor locker applications, including:

  • Schools
  • Employee Lockers
  • Health Clubs
  • Gym Lockers
  • Self-Storage Units

Product Specifications: 

  • Model Number: 1525
  • Shackle Length: 3/4 in (19 mm)
  • Shackle Diameter: 9/32 in (7 mm)
  • Body Width: 1-7/8 in (48 mm)
  • Color: Black 

Choose from the following dial colors for a slight up-charge: 

  • Blue
  • Gold
  • Grey
  • Green 
  • Orange
  • Purple
  • Red 

 *Control Keys Sold Separately.  

Need 1000 or more locks? Call for a price quote! 

Contact us by phone (888.881.4245), fax (888.881.4248) or email ( 

BlockGuard® Anti-Shim Padlock Technology

The Issue: Shimming

Shimming is defined as violating a lock by inserting a foreign object into the latch mechanism. This is an industry wide issue – nearly all dial type combination hanging padlocks from all lock manufacturers are affected.

Since students are storing higher valued/desired items in their lockers such as cell phones, music devices, tablets, computers & more, thieves have more of a reason to try to shim a lock to break in.

Master Lock thought of the solution.



The Solution: BlockGuard®

BlockGuard Anti-Shim technology is a new latch assembly where the latch has a small profile that does not overhang the shackle, so there is no target for the shim tool to hit.

The latch also has a flat shape, blocking the shim tool and a grooved top to actually trap the shim tool, which creates a tighter latch-to-shackle engagement when hit.

BlockGuard® is available on Master Lock models 1502, 1525, 1572, 1585, 2076, A400 and A400K.



Need 1000 or more locks? Call for a price quote!

Contact us by phone (888.881.4245), fax (888.881.4248) or email (


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3 Reviews

  • 5

    Great classic lock

    Posted by Jennifer Palmer on Nov 13th 2019

    There's a reason these locks haven't changed much in the years they have been around. They are easy to use (once you teach someone) and reliable. A great, classic lock.

  • 5

    Combination Locks

    Posted by Tamye McMinn on Sep 5th 2019

    We are satisfied with the locks and have used this style or model for many years. The company is good to work with and I would recommend them to others.

  • 5

    Great Price

    Posted by Mack Skelton on Jul 30th 2018

    We got exactly what we needed at nearly half the price.

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