5 Most Popular Padlock Bump Keys in North America

Padlocks are used everywhere — gates, sheds, trailers, job sites, lockers, and storage units.
However, most padlocks are manufactured using only a handful of common keyways.

At Keys Cut Quick, we focus on the padlock keyways that locksmiths, technicians, and first responders encounter most often.

Below are the five most popular padlock bump keys in North America.

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M1 Bump Key

The M1 keyway is one of the most widely used keyways in Master Lock laminated padlocks.

This keyway is commonly found in consumer padlocks such as:

Master Lock No. 1
Master Lock No. 3
Master Lock No. 5
Master Lock No. 7

These locks are frequently used on:

• Residential gates
• Storage sheds
• Tool boxes
• Lockers
• Utility equipment

Because of its widespread use, the M1 bump key is considered an essential key for any bump key set.

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M13 Bump Key

The M13 keyway is another extremely common Master Lock keyway, often used in newer padlock designs and many commercial-grade Master locks.

This keyway appears in many:

• Master Lock laminated padlocks
• Master Lock Pro Series locks
• Job site security padlocks

Due to the popularity of Master Lock products across North America, the M13 bump key is one of the most useful keys to carry.

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AM3 Bump Key

The AM3 keyway is used by American Lock laminated padlocks, a brand known for stronger construction and higher durability.

Common American Lock models using this keyway include:

American Lock A20
American Lock A30
American Lock A40
American Lock A50

These locks are commonly used on:

• Commercial gates
• Industrial equipment
• Storage containers
• Work trucks

Because American Lock padlocks are widely used in commercial environments, the AM3 bump key is a must-have for professional locksmith kits.

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AM1 Bump Key

The AM1 keyway is used in many American Lock aluminum body padlocks, including the popular American Lock 1100 Series.

These locks are often used for:

• Lockout / Tagout systems
• Industrial security
• Government facilities
• Utility companies

The AM1 keyway is slightly different from laminated American Lock models, which makes the AM1 bump key an important addition to any professional bump key collection.

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M10 Bump Key

The Most Popular Padlock Bump Key in America

The M10 keyway is one of the most commonly encountered padlock keyways in the United States and Canada.

It is used in a wide range of Master Lock padlocks, including both consumer and commercial models.

Because this keyway appears in so many different locks, the M10 bump key is widely considered the most useful padlock bump key in North America.

You will frequently encounter this keyway on:

• Storage units
• Construction sites
• Utility locks
• Commercial gates
• Trailer locks

For locksmiths, first responders, and security professionals, the M105 bump key is often the first padlock bump key they reach for.

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Why These Keys Matter

While thousands of padlock keyways exist, the majority of padlocks in North America use only a few common profiles.

By focusing on these keyways, locksmiths can carry a small but highly effective bump key set capable of covering a wide range of real-world situations.

The keys above represent the core padlock bump keys used by professionals across North America.

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Why Buy From Keys Cut Quick

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Remember "Bump Rings" Wear Out Quickly. So Have Extra's on Hand