Masterlock 6321K High Security Solid Iron Shrouded 54mm Wide Body Boron Shackle

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This is a non-returnable Product.

Masterlock 6321K High Security Solid Iron Shrouded 54mm wide body Boron Shackle

The Master Lock 6300 ProSeries® Shrouded Padlock feature a heavy steel body that withstands physical attack and a hardened boron alloy shackle for superior cut resistance. Ideal for transportation and industrial applications, the iron shroud protects the shackle from bolt cutters and a dual ball locking mechanism resists pulling and prying. The high security, rekeyable 5-pin cylinder with spool pins is virtually impossible to pick.


  • 54mm wide laminated steel body with Weather Tough® cover
  • Hardened boron alloy shackle with iron shroud


  • Ideal for harsh outdoor conditions; Exclusive Weather Tough® cover protects lock from water, ice, dirt and grime
  • Iron shroud gives extra shackle protection for transportation and industrial applications
  • ProSeries® Padlocks are designed for Commercial/Industrial applications


  • High security, rekeyable 5-pin cylinder
  • Can be supplied keyed alike, or on Edge™ restricted profile


  •  Weather Tough® cover, iron shroud and hardened boron alloy


  • Dual ball locking mechanism resists pulling and prying
  • Iron shroud protects shackle from cutting and prying

Shackle material & size

  • Hardened boron alloy shackle
  • 10mm diameter x 19mm clearance
Warranty Documents
  • document name
  • format
  • size
  • download
    • Masterlock Warranty
    • 102KB

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