RENZ Security Lock


A replacement security lock for mailboxes manufactured by RENZ.

Please note, the two keys supplied with the lock are coded specifically for use with each lock – the codes shown in the product photograph are for illustration purposes only.

– 1 x Lock
– 2 x Coded keys
– 1 x Securing Clip

Important: Please make sure the delivery address you enter on the checkout is different to your mailbox address.

SKU: ERRENZLock Category:
Additional information

[tabby title=”FAQ”]

Will this lock be suitable for my mailbox?

This lock can be used with any mailbox manufactured by RENZ. If you do not have a mailbox manufactured by RENZ, this lock cannot be used with the item.

Do I need a lock?

We will always advise you on the best and safest route to take when ordering replacement keys and locks. If you are new to a property that has previously been occupied then we suggest you change your lock as the previous occupiers may still hold keys.

How do I fit a RENZ mailbox lock?

Replacing the mailbox lock is straight forward and requires a basic level of DIY skill. Please use the following instructions to guide you through the process, or give us a call for any advise.

Important: Please work in a safe manner using relevant PPE guidelines (safety glasses & gloves)

  • Fit a 3.5mm diameter steel drill bit in a power drill to use.
  • Place the drill bit into the hole of the lock (be careful not to damage the body of the mailbox), drill straight and apply consistent pressure.
  • Drill into the lock to a depth of approximately 16mm. Once you have reached this depth, the internal pins will start to break down and you will feel the lock work a little loose.
  • Remove the drill and insert a small screw driver – twist the screw driver until the lock releases and the door opens.
  • The lock does not open – drill further into the lock and repeat.
  • Once the door of the mailbox is open:
    • Using a screwdriver, pry the small cap from the rear of the lock.
    • Remove the washer between the cap and the CAM arm
    • Remove the ‘CAM’ which holds the door closed.
    • Remove the securing clip which tightens and secures the lock to the body of the mailbox.
    • Place the new lock into the lock hole.
    • Fit the securing clip to the lock.
  • Using the new keys, check that the lock is now securing the door.
Weight 0.5 kg