In the world of home security, a Spare Key is more than just a convenience—it is a necessity. This is particularly true for specialized hardware like Rack Bolts and Concealed Mortice Bolts, which utilize a unique “star” or “splined” drive. Unlike standard door keys, these are designed to be compact and discreet, making them easy to misplace during renovations or property handovers.
Our spare keys are engineered from hardened steel or high-tensile zinc alloy, ensuring they can withstand the torque required to throw a heavy-duty bolt without bending or snapping. Having a spare key strategically located or held by a trusted neighbor ensures that you maintain full control over your security layers at all times.
Why Our Spare Key is the Professional Choice
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Universal Star-Drive Compatibility: Specifically designed to fit the industry-standard splined drive found in 37mm, 61mm, and 80mm rack bolts.
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Precision-Cut Flutes: The “star” pattern is machined to exact tolerances, ensuring it engages perfectly with the internal gear of the bolt for a “silk-smooth” turn.
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Ergonomic Grip: Features an oversized head or “bow,” providing the necessary leverage to operate bolts that may have become stiff due to door movement or seasonal swelling.
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Durable Anti-Snap Build: Constructed from robust materials that resist the twisting force (torque) often applied to older or less-maintained locks.
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Corrosion-Resistant Finish: Finished in a protective coating to prevent rust, ensuring the key remains functional even if stored in an outdoor “hide-a-key” or a damp garage.
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Compact Profile: Easily fits onto a standard keyring or inside a secure key safe without adding unnecessary bulk.
Technical Specifications
| Feature | Specification |
| Key Type | Star Key / Splined Rack Bolt Key. |
| Material Build | Hardened Steel or Zinc Alloy. |
| Compatibility | Standard UK Mortice Rack Bolts. |
| Length | Typically 50mm to 75mm (Standard reach). |
| Drive Pattern | 8-Point or 10-Point Star (Industry Standard). |
| Finish | Zinc Plated or Nickel Plated. |
Best Practices for Spare Key Management
To maximize your security and the lifespan of your locks, follow these professional tips for managing your Spare Keys:
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Test Before You Need It: Always test a new spare key as soon as it arrives. Ensure it operates the bolt smoothly in both the “locked” and “unlocked” positions. If there is any resistance, the bolt may need lubrication.
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Dry Lubrication: If your key feels “crunchy” or difficult to turn, do not force it. Apply a puff of dry graphite lubricant into the keyhole. Avoid using wet oils (like WD-40) as they can attract grit that wears down the key’s splines.
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Strategic Storage: Avoid the “under the mat” cliché. Use a police-approved key safe or a secure “lock box” mounted in a discreet location to store your spare.
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Labeling for Clarity: If you have multiple rack bolts (e.g., front door vs. back door), use color-coded key caps or small tags. Trying to force the wrong key into a similar-looking bolt can damage the internal drive.
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Audit Your Access: Every year, account for all your spare keys. If a key has been lost or not returned by a former contractor or tenant, consider replacing the internal rack bolts for total peace of mind.
The Smallest Part of Your Security Strategy
A Spare Key is a minor investment that prevents a major headache. Whether it’s for a concealed door bolt or a secondary security point, having a high-quality, precision-cut spare ensures that you are never locked out of your own protection. Don’t wait for an emergency to realize you’re a key short—secure your backup today.
This spare key is made to suit the London Fire Brigade lock with key profile 02, offering a practical replacement or backup option. Designed to match the correct profile, it provides a smooth fit and reliable function, ensuring the lock continues to operate as intended. Having an extra key on hand is always useful, whether for emergencies, replacements, or for providing access to additional users when needed.
Strong and durable, this spare key is built to last and can handle regular use without wear. It is simple to use, lightweight, and easy to store as part of your security essentials. Suitable for use in residential, commercial, or specialist applications where a London Fire Brigade lock is installed, this key helps maintain safe and secure access. Keeping a spare ensures peace of mind in case of loss or damage to the original. A convenient, reliable, and cost-effective solution, this key is an important accessory to support the ongoing use of your lock.












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