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Singapore #1 Digital Letterbox Lock & Smart Mailbox Lock Service

Need a Digital Letterbox Lock or Smart Mailbox Lock in Singapore? Upgrade from old keys! We specialize in fast, affordable **installation** and **replacement** for all HDB & condo letterboxes. Choose a secure, keyless **digital mailbox lock** today!

Warranty Assurance: All our locks come with a 1-Year Seller Warranty with On-Call Support – Singapore's Only One!

Order Your Mailbox/Letterbox Digital Lock Now ↓
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Choose Your Lock Model

PRODUCT 1 - Traditional Key Mailbox Lock Replacement Singapore
P1: Traditional Key Lock
SGD 50 w/ Install
PRODUCT 2 - Battery-Free Mechanical Letterbox Lock Singapore
P2: Battery-Free Mechanical
SGD 50 w/ Install
PRODUCT 3 - Password & Key Digital Letterbox Lock
P3: Password & Key (Backup)
SGD 55 w/ Install
PRODUCT 4 - Smart Battery-Powered Digital Mailbox Lock
P4: Smart Battery Lock
SGD 60 w/ Install
PRODUCT 5 - 3-Digit Ergonomic Mechanical Mailbox Lock
P5: Ergonomic Lock
SGD 60 w/ Install
PRODUCT 6 - Zinc Alloy Mechanical Digital Code Lock
P6: Zinc Alloy Code Lock
SGD 65 w/ Install
PRODUCT 7 - Horizontal Smart Battery Digital Lock
P7: Horizontal Smart Lock
SGD 65 w/ Install
PRODUCT 8 - 4-Digit High Security Mechanical Mailbox Lock
P8: 4-Digit High Security
SGD 75 w/ Install
PRODUCT 9 - 4-Digit Zinc Alloy Mechanical Lock
P9: 4-Digit Zinc Alloy Lock (NEW)
SGD 85 w/ Install

Compare: Digital vs. Smart vs. Key Locks

Not sure which **letterbox digital lock** is right for you? Compare our top models below to find the perfect fit for your HDB or Condo mailbox.

Feature P1 (Key) P2 (Mech) P3 (Pass) P4 (Smart) P5 (Ergo) P6 (Zinc) P7 (Horiz) P8 (Hi-Sec) P9 (Zinc-4)
Price (Inc. Install)$50$50$55$60$60$65$65$75$85
Unlock MethodKeyCodeCodePINCodeCodePINCodeCode
Battery Req?NoNoNoYesNoNoYesNoNo
Retrieval Key?N/ANoYesNoYesYesNoYesYes

Order Confirmation Form

For confirmed orders, please fill below.
For general questions, click the WhatsApp Icon at bottom right.

1. Customer Info
2. Lock Details

Service Coverage & Common Issues

We provide professional **digital letterbox lock installation** and **smart mailbox lock upgrades** islandwide. We solve all common problems, including **lost HDB letterbox key**, **mailbox lock replacement**, or if your **mailbox lock is spoiled**. We are your trusted **letterbox locksmith** in all HDB estates:

Ang Mo Kio, Bedok, Bukit Merah, Hougang, Jurong, Punggol, Sengkang, Tampines, Woodlands, Yishun, and all other areas in Singapore.

What Our Customers Say

"Excellent service! The technician arrived on time and replaced my HDB mailbox lock in under 20 minutes. The new digital lock is so convenient. Highly recommended!"

β€” Brenda Tan, Ang Mo Kio

"Lost my keys and was locked out of my condo letterbox. Called them for their emergency unlock service. They were fast, professional, and the price was very reasonable. Thank you!"

β€” Rajesh Kumar, Tampines

"The smart lock is a game-changer. I love the peace of mind knowing my mail is secure. Installation was seamless. Great job!"

β€” Siti Aishah, Punggol

"Very responsive seller on Carousell! Installation of the digital letterbox lock was quick and fuss-free. Lock works perfectly."

β€” User_ABC (via Carousell)

"Good quality digital lock for my HDB mailbox. Cheaper than other places. Recommended seller from Carousell."

β€” Buyer_XYZ (via Carousell)

Frequently Asked Questions (Mailbox Locks)

What should I do if I lost my HDB letterbox key?
If you've lost your HDB letterbox key, don't worry. Contact our 24/7 emergency service. We can either unlock your existing letterbox for a SGD 25 fee, or we can replace the entire lock with a new digital one, which includes the unlocking service. This is often the best time to upgrade to a keyless solution.
How much does it cost to change a mailbox lock in Singapore?
Our prices for changing a mailbox lock start from just SGD 50. This price includes the new lock and the full installation service. If your current lock is locked and you've lost the key, an additional SGD 25 unlocking fee applies.
What warranty do you provide?
All our digital and mechanical mailbox locks include a **1-Year Seller Warranty with on-call support** – **Singapore's Only One!**, giving you complete peace of mind.
How long does the installation take?
Installation is very fast, typically taking only 15–30 minutes. We provide on-call service, and our standard lead time is just 1–2 business days after you confirm your order.
Will you damage my letterbox?
No. Our technicians are professional locksmiths who use specialized tools to ensure a clean installation or replacement with no damage to your letterbox door.
Do your digital mailbox locks require batteries?
Our most popular password and key models (Product 1, 2, 3, 6, 8, 9) are fully mechanical and do not require batteries. Only the "Smart Battery-Powered" locks (Product 4, 7) use CR2032 batteries, which last over 12 months.
What is "Retrieve Password" on some locks?
Our models like Product 3, 5, 6, 8 and 9 have a password retrieval mechanism. This means if you forget your code, you don't need to break the lock. We can use a master key or tool to find your password for you. Crucially, this key cannot open the lock directly.
Can I replace my old mechanical lock with a digital one?
Yes, absolutely! Our service is primarily focused on replacing old, faulty, or key-based locks with modern digital and smart options. Our team ensures a perfect fit for nearly all HDB and condominium letterbox models.
Do you sell Traditional Key Locks?
Yes, we do! If you prefer a simple solution, our PRODUCT 1: Traditional Key Mailbox Lock is available for SGD 50, which includes installation and two new keys.
How secure are mechanical digital letterbox locks?
Mechanical digital locks are highly secure. Especially our Product 8 & 9 (4-Digit Locks), which offer 10,000 combinations, making them extremely secure against guessing.
Do you provide emergency service outside of regular business hours?
Yes, we offer 24/7 on-call support for emergency services, especially for mailbox unlocking (SGD 25 fee applies). We understand that urgent issues like lost keys can happen anytime.

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