Types of Keys That Can Be Cut and What You Need to Bring

Key cutting is a simple and helpful service that lets you create copies of your keys. Whether you need a spare for someone in your home, have lost your original, or want to keep a backup just in case, getting a key cut is something most people will need at some point. The process is usually quick and can be done while you wait in many local shops.

There are many types of keys that can be duplicated, ranging from basic household keys to more complex ones like vehicle or security keys. Some are easy to copy, while others may require proof of ownership or special tools. Understanding what kind of key you have and what you need to bring can save you time and ensure your new key works properly.

Having a spare key can also reduce stress during emergencies, like when you're locked out or lose your main set. It provides peace of mind and can be a smart decision for families, housemates or anyone who shares access to a property or space.

The Most Common Key Types You Can Have Duplicated

Most people have at least one type of key that is used regularly. These keys are usually quite easy to copy and are available to duplicate in most local key cutting shops. Having extra copies of these common keys can be very helpful in daily life.

Here are some of the most typical key types you might come across and can get cut without too much trouble.

Household Keys

These are the keys used for your front door, back door, and other doors inside your home. The most common types are Yale keys, which are flat with cuts on one edge, and mortice keys, which are usually longer and fit into older locks. These keys are often cut using standard machines and are widely available at hardware stores and locksmith shops.

Padlock Keys

Padlocks are used to secure gates, lockers, sheds and toolboxes. Their keys come in different shapes and sizes but are usually small and basic. They can be cut easily as long as the original is in good shape. Some padlock keys may be round, while others look similar to household keys.

Filing Cabinet and Locker Keys

These keys are usually small and thin. They are often used in offices, schools, gyms and other shared spaces. You will often find a code printed on them, which helps the key cutter pick the right blank to duplicate your key correctly. These keys are not complicated and are usually made of softer metal.

Garage and Postbox Keys

Garage and postbox keys are used to open storage areas or collect your post. They are often smaller than household keys and may wear out quicker. Replacing them is usually straightforward, and most key cutters will be able to match the key and produce a new copy quickly.

Window Lock Keys

These keys are used for locking and unlocking windows, especially in older homes or flats. They tend to be small and can often be cut using standard key cutting tools. If your window lock key is worn or lost, bringing the lock or a photo of it can help the cutter identify the right type.

Keys That May Require Specialist Equipment or Proof

While many keys are easy to cut, others are designed to offer more security. These types of keys may be restricted, patented or have features that make copying harder. Cutting these keys is still possible but may take longer or require extra steps.

Car keys are one example. Many modern cars use transponder keys or smart keys. These contain electronic chips or signals that must match the car's system. It is not enough to simply cut the key to shape. It also needs to be programmed correctly to work. Not all key cutting shops can do this, so it is worth calling ahead to check.

Patented keys are protected by law. Only certain locksmiths or suppliers are allowed to duplicate them. These may be used in commercial buildings, rented homes or schools. The keys often have “Do Not Copy” or “Restricted” written on them. If you need one of these keys duplicated, you will likely need written permission from the keyholder or proof of ownership.

High-security keys may also require special machinery. Some use magnets, dimple patterns or multiple cutting angles. Others come with a key card that must be shown before cutting. These keys offer stronger protection but are more difficult and sometimes more expensive to replace.

There are also some keys that are part of digital systems or smart locks. These may not use a traditional metal key at all. If they do have a physical backup key, it is often unique and can only be copied through the original provider or a registered locksmith.

What to Bring When You Visit a Key Cutting Shop

Before visiting a key cutting shop, it is important to bring the correct items. This ensures the shop can make your key accurately and without delays. The original key is the most important thing to bring. If the original is bent, chipped or worn, it may not be possible to copy it correctly.

For restricted or high-security keys, you will usually need to show identification or permission. This might be a key card that came with the key, a letter from your landlord, or an invoice showing you are the property owner. If you are cutting a car key, you may be asked for your logbook or driving licence.

Try to give as much information as possible about the key. If you know the brand of the lock or the model of your vehicle, tell the staff. If the key has a code stamped on it, bring that information with you. This helps the shop find the right blank and tools more quickly.

If the key is used at work or in a public building, you may need to show company ID or written permission from a manager. This helps prevent unauthorised copies and keeps the system secure for everyone.

Some key cutting shops also offer mobile services or appointment bookings. If your key is part of a larger system or if you’re unsure what to bring, phoning ahead to ask what’s needed can make things easier and save a return trip.

How to Spot If Your Key Is Unusual or Harder to Copy

Most keys are quite standard, but some have special features that make them more difficult to duplicate. If you are unsure about your key, there are a few signs that can help you decide whether it is likely to need extra steps for cutting.

Being able to spot an unusual key early can help you choose the right key cutting shop and bring the correct information with you.

It Has a Chip or Battery Inside

If your key has buttons, lights or feels heavier than normal, it might contain a chip or battery. These are often used in car keys or alarm systems. Simply cutting the key is not enough in these cases. The chip must also be programmed to match your vehicle or system. Not all shops offer this service, so it is best to check before visiting.

It Says “Do Not Duplicate” or Has a Number Code

Keys with a “Do Not Duplicate” message or a number code may be protected by law or company policy. These are usually part of a restricted system, meaning only approved people or shops can copy them. If your key has one of these messages, you will likely need to bring proof of ownership or permission before it can be cut.

It Looks Very Unusual or Thick

Some keys are built with extra size, odd shapes or unusual grooves. These may include high-security keys, dimple keys or keys with magnetic features. They cannot be copied using standard machines. If your key looks different from most household keys, it is best to ask the shop if they can cut it or if it needs to be sent off to a specialist.

It Belongs to a Digital or Smart Lock

Some newer locks use digital access methods and do not rely on a traditional key. However, many still include a backup key. These keys are often specially made and might only be available through the lock manufacturer or a registered locksmith. If your key looks plain but belongs to a smart lock, it may still need specialist help.