What Are the Most Popular Key Blanks?

Whether you’re replacing a lost key, getting a backup made, or starting a key-cutting business, understanding which key blanks are most commonly used can save time and money. But what are the most popular key blanks out there — and how do you know which one you need?

Why Key Blanks Matter

A key blank is a key that hasn’t yet been cut. It’s the starting point for creating a copy of an existing key. From apartment entry keys to commercial building locks, different locks require different blank types. 

If you’re simply looking to copy a key, using the correct blank ensures the new key works just like the original. If you’re running a key cutting service or starting one, stocking the most popular blanks ensures you can help the widest range of customers.

The Most Popular Key Blanks

Here are some of the most commonly used key blanks in North America, especially in residential and commercial buildings:

• KW1 (Kwikset) – Commonly used in residential locks. Great for tenants and homeowners.
• SC1 and SC4 (Schlage) – Popular in both homes and commercial buildings due to higher security.
• M1 (Master Lock) – Used frequently for padlocks, lockers, and other portable locks.
• Y1 (Yale) – Often found in older residential and office locks.
• Ilco 1092 or Ilco X29 – Common for mailbox locks.
• WR5 (Weiser) – Another residential standard in Canada.
• Best A1114 – More commonly used in commercial master key systems.

Not sure which blank you need? Our post on how to cross-reference key blanks can help match your existing key to the right blank.

Thinking of Starting a Key Cutting Business?

If you’re interested in launching a small side hustle or expanding an existing business, learning about popular blanks is a great first step. We recommend reading our guide: How to Start a Key Cutting Business and Partnering for Expertise.

You’ll also want to understand the tools of the trade. Learn how key cutting machines work — and if you’re ready to get started, we carry key cutting machines and key blanks in our online shop.

Just Curious or Need a Fast Copy?

Even if you’re not starting a business, knowing which key blank your key uses can be helpful when making a fast copy. At MiniFob, we copy keys and fobs within minutes, and we only use high-quality blanks for long-term reliability.

So if you’ve lost your key, need a spare for roommates or visitors, or just want a backup, we make the process fast and stress-free.

Final Thoughts: What Are the Most Popular Key Blanks?

Key blanks may seem small, but they’re the foundation of secure access for apartments, homes, and businesses. Whether you’re a tenant, a landlord, or an aspiring key cutter, understanding the most popular key blanks can save you time and help you make better choices.

Still unsure which blank your key needs? Come by one of our locations — or check out our store locator and online shop.