Master Lock 5403 Large Combination Spare Key Safe

Quickfind Code : B1171 More info

Need a larger key safe to store your keys outdoors? The Master Lock 5403 Extra Large Key Safe is the answer.
The Master Lock 5403 Extra Large Key Safe is designed with a choice of up to 10,000 codes. Will accommodate larger mortise keys, Check dimensions below.

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Need a larger key safe to store your keys outdoors? The Master Lock 5403 Extra Large Key Safe is the answer.
The Master Lock 5403 Extra Large Key Safe is designed with a choice of up to 10,000 codes. Will accommodate larger mortise keys, Check dimensions below.


This Master 5403 wall mounted key safe with large storage capacity allows keys to be left outside in a secure box for authorised people to access with a combination code.

Features of the Master Lock 5403 Large Outdoor Key Safe 

  • The Master 5403 large external wall mounted key safe
  • It allows storage for bunches of keys, credit cards.
  • Can hold up to 6-8 keys depending on key size
  • Drop down hinged door with a 4 wheel reprogrammable lock
  • To close - just close door and scramble the four wheels to lock
  • Reinforced Zinc alloy Body withstands hammering and sawing
  • It's ideal for use in domestic and commercial applications,
  • By children after school, holiday cottages, caravan or car, district nurses or carers,
  • Maintenance teams, construction workers, cleaning service employees etc.
  • Jumbo size allows storage of bunches of keys, credit cards and many other items.
  • Wall Fixing with 4 wheel resettable combination
  • Includes protective plastic 4 wheel dial cover

Uses for the MasterLock Large Key Safe 5403D for Storing Spare Keys

  • Used extensively by Social Services throughout the UK to allow Health Visitors access to Patients
  • Fitted by Local councils for use by Carers visiting the Elderly or Infirm who have mobility issues
  • Popular with Holiday Letting Companies to allow remote access to paying guests
  • Allows children to have safe and secure access to the family home when parents are out or late
  • used by emergency services such Police, Fire and Ambulance for Speedy access
  • Used by businesses to allow access to premises out of hours
Read a review of this product


  • Brand: Master Lock
  • Key Storage Product Range: Master Lock Outdoor Key Safes
  • Manufacturer Part #: 5403
  • Condition: New
  • Choice of Key Safe Lock: Number Dial Lock
  • Fixing Options: Rear fixing to a wall
  • Colour: Grey
  • Weight (kg):
    0st, 2lbs (approx)
  • Warranty Period: Lifetime
  • Standard Delivery Time: 1-2 business days
  • External Dimensions
    H 146 x W 105 x D 51 (mm) H 5.75 x W 4.13 x D 2.01 (inches)
  • Internal Dimensions
    H 117 x W 79 x D 42 (mm) H 4.61 x W 3.11 x D 1.65 (inches)

Customer Reviews


Click here to ask us a question...

Can this keysafe be attached to a wooden wall?

This Master Lock 5403 Key Safe, like any similar key safe, can be screwed to a wooden wall, but you may need to evaluate whether there is a risk that the safe may be more easily removed than if it was secured to either a brick or stone wall. If you can disguise its' location then you woiuld probably have no problem

Question asked by Maggie Harrison on 15 Nov 2016

I'm changing from a smaller model Masterlock product to this one. Do the screws holes match?

I guess you are changing from the smaller Master Lock 5401 to the 5403. Unfortunately not all holes will align.

Question asked by Triston Taylor on 8 Dec 2016

Expert Guides



*However if the basket value is less than £50 there is a small order Handling Charge of £2.99 incl. VAT to cover administration only

*Does not include Highlands and Islands plus Northern Ireland  - Contact us for price

*All Steel Storage and Safes with weights exceeding 100kg will be liable for an extra charge if delivered north of the line between Glasgow and Edinburgh.

Delivery Times

Average Delivery times are listed against each individual product. Normally the delivery times (except where detailed) are :

Products weighing less than 30kg take 1-5 working days

Products weighing 31-100kg take 5-7 working days

Products weighing more than 100kg take 5-10 working days unless on a kerbside pallet delivery

Lockers and Steel Storage are delivered to your nearest kerbside entrance in 10-15 working days unless specified on the individual product.

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Returns & Refunds

This policy is offered in addition to your statutory rights.

You may return your purchase to Safe Options for a refund by obtaining a Customer Return Authorization (CRA) number within 14 days of the delivery date. To obtain a CRA please e-mail your invoice or order number and reason for return using the contact form. Alternatively you may contact our customer service department on 0117 929 2104.

Please note returns are subject to the following conditions:

1. You must have received a CRA number from our customer service department.
2. The product must be in "as new" condition, with original packaging and with all manuals and accessories.
3. You will receive a refund excluding the original delivery charge included in our price.
4. Special services such as Professional Installation are non-refundable.
5. Made to order items such as cut keys, keyed alike locks, Steel Cabinets and Lockers are non-refundable.
6. Products with bespoke modifications that are not available to order online are non-refundable.
8. Please allow up to 28 days for refunds to be processed and credited to your account.


If the product you purchase is faulty, we may offer a repair, exchange or refund as appropriate in accordance with your legal rights. Please email customer services or contact us on 0117 929 2104 if you feel your purchase is faulty.

£42.00 inc VAT

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FREE Delivery 1-2 business days

Extra service delivery times vary

0800 567 7549  0117 929 2104

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