The Combination Padlock series is equipped with a precision digital combination locking mechanism, providing keyless one-touch unlocking and convenient access. It is widely suitable for various applications, including luggage, storage cabinets, gyms, schools, and locker systems. Made from high-quality alloy and brass materials, the entire series features wear-resistant and corrosion-resistant lock bodies with reinforced shackles for enhanced anti-pry protection. The built-in multi-wheel combination structure provides tens of thousands of password combinations to effectively prevent unauthorized opening, ensuring stable security performance. Available in various materials, including brass, aluminum, zinc alloy, and stainless steel, the series offers a wide range of specifications. We support customized services such as laser logo marking and embossing, making these Combination Padlocks ideal for bulk export orders, retail distribution, and engineering procurement.
Product Features1. Pure brass lock body, rust-resistant and corrosion-resistant, with high-end texture and long service life.2. The shackle can be hardened, resistant to sawing and prying, safe and re...
Product Features1. High-pressure die-cast zinc alloy integrated lock body, with a dense internal structure without gaps. The surface is smoothly polished, providing a delicate touch without burrs;2. M...
Product Features1. Stainless steel material, excellent rust resistance and corrosion resistance, suitable for harsh outdoor environments.2. Precision combination mechanism, a large number of password ...
Rongtao Hardware is a source factory for locks with over 30 years of experience. We support customized designs and are a trusted supplier for overseas buyers.
About Us
Zhejiang Rongtao Hardware Products Co., Ltd. is a China Combination Padlock Manufacturer and OEM/ODM Combination Door Lock Factory, established in 2021 at No. 11 Wuhan Road in Shangxi Town, Yiwu City, Zhejiang Province, China. Our company owns the Yiwu Shengping Lock Factory, which boasts nearly 30 years of professional padlock manufacturing experience.
We have also established Yiwu Rongtao Renewable Resources Co., Ltd. to achieve strict control over raw materials for padlock production. With a commitment to integrity and on-time delivery, we have earned the lasting trust of our clients worldwide.
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100
Employees
20+
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It is 6:40 a.m. and a service van is parked outside a locked commercial unit. The electrician has the work order, the parts, and a two-hour window before the tenant arrives. What he does not have is the key, and the facilities manager is forty minutes away. Every trade runs into a version of this: ...
It is 11:40 p.m., your guest is standing on the porch, and the key is inside a small metal box that will not open. Nobody is driving over to help, and the first line of the review is already being written. Every host who runs self check-in has either lived that night or spent money to avoid it.
The...
You finish your workout, walk back to the changing room, and find that the lock on your gym locker is jammed or missing. It happens more often than people admit: the wrong padlock either fails to fit the locker hasp, rusts solid in a humid changing room, or gets cut in seconds because the shackle i...
The best combination padlock depends on where you use it. Brass suits outdoor storage and sheds, aluminum suits gym lockers and luggage, zinc alloy disc locks suit tool boxes and gates, and stainless steel disc locks suit wet or coastal sites. A 4-wheel code gives 10,000 possible combinations (10 x 10 x 10 x 10), which is enough for everyday protection without carrying a key.
A combination padlock opens with a digital wheel code instead of a key. There is no key to lose, no key to copy, and one code can be shared with a team. This guide compares the four main materials, shows how the wheel mechanism works, and gives a simple method for choosing the right lock.
Quick Answer: Which Material Should You Choose?
Brass
Best for long-term outdoor use where rust is the main risk.
Aluminum
Best for lightweight needs, color coding, and luggage.
Zinc alloy disc
Best for strength on a budget, with a shielded shackle.
Stainless steel disc
Best for wet, humid, or salt-air environments.
How a Combination Padlock Works
Inside the lock body, each number wheel has a notch cut into its edge. When all wheels are turned to the correct digits, the notches line up in a straight channel. This lets the locking bar drop into the channel, and the shackle can then be released with a push or pull.
3 wheels1,000 combinations
4 wheels10,000 combinations
5 wheels100,000 combinations
Each extra wheel multiplies the possibilities by ten. A 4-wheel lock takes an average of about 5,000 guesses to crack by brute force. At one guess per second, that is nearly 1.5 hours of nonstop trying, which is why most people choose 4 wheels for lockers and storage.
Brass Combination Padlocks
Pure brass is naturally resistant to rust and corrosion, so it stays reliable in rain, humidity, and temperature swings. Brass bodies are dense and heavy, which gives a solid feel and resists impact. Sizes usually range from small 20 mm bodies for bags to wide 50 mm bodies for sheds and cabinets.
Rust-resistant body for outdoor storage
Stainless steel or hardened steel shackle options
Wide size range for different shackle heights
Aluminum Combination Padlocks
Aluminum alloy bodies weigh about one third as much as brass of the same size. That makes them a smart choice for luggage, backpacks, gym bags, and school lockers where weight matters. They are also easy to anodize in many colors, so a team or family can assign one color per person.
LightweightColor codingIdeal for luggageGood for gyms
For example, a school with 500 lockers can use five colors to mark five grade levels. Staff can then see at a glance which locker belongs to which group.
Zinc Alloy Disc Combination Padlocks
A disc padlock has a round body that wraps around the shackle. Only a small part of the shackle is exposed, so bolt cutters and pry bars have almost nothing to grab. Die-cast zinc alloy gives this shape high strength at a lower cost than steel.
Disc locks are common on tool boxes, storage units, fences, and gates. Colors such as black, blue, red, and green also make them easy to tell apart.
Stainless Steel Disc Combination Padlocks
Stainless steel has the best rust resistance of the four materials. If the lock stays wet, sits near the sea, or is used in a pool area or boat yard, this is the safest pick. The hardened shackle and shielded disc design also give strong anti-pry protection.
Rust resistance
Anti-pry strength
Light weight
The bars above are a general guide to how stainless steel disc locks compare on each trait. They are trade-offs, not lab test scores.
Material Comparison at a Glance
Type
Rust Resistance
Weight
Best Use
Brass
High
Heavy
Sheds, cabinets, outdoor storage
Aluminum
Medium
Very light
Luggage, gym bags, school lockers
Zinc alloy disc
Medium
Medium
Tool boxes, gates, fences
Stainless steel disc
Very high
Medium to heavy
Wet, humid, or coastal sites
How to Choose the Right Lock in 4 Steps
Check the environment. Wet or salty air points to stainless steel or brass. Dry indoor use is fine with aluminum or zinc alloy.
Match the shackle. Measure the hole or hasp. A shackle that is too short will not close, and one that is too long is easier to leverage.
Pick the wheel count. Use 3 wheels for low-risk items like luggage, and 4 wheels or more for lockers and storage.
Plan for volume. Bulk buyers should ask about a custom laser logo, embossing, and color options before ordering.
Tips for Setting and Using Your Code
Avoid obvious codes
Codes like 0000, 1234, and birth years are the first ones a thief will try.
Scramble after locking
Spin every wheel after you close the lock so the code is not left on display.
Record the code safely
Store it in a password manager, not on a sticky note beside the locker.
Bulk Orders and Custom Options
Combination padlocks are popular for export, retail packaging, schools, gyms, and hotels. Suppliers can usually add a laser-marked logo, embossed branding, custom colors, and private packaging. For retail, a lock with a clear color and a clean logo sells better on a shelf. For institutions, matching one color to one purpose makes management much easier.
Frequently Asked Questions
Are combination padlocks safe?
Yes, for everyday storage. A 4-wheel lock has 10,000 combinations and a hardened shackle resists cutting. For very high-value items, choose a thicker shackle or a disc design.
Can I change the code?
Most models allow it. You open the lock, press or slide the reset control, set new digits, and return it to the locked position. Check that the new code works before you rely on it.
Which type is best for outdoor use?
Stainless steel disc and brass locks handle rain and humidity best. Aluminum can be used outdoors for short periods but is better suited to indoor lockers and bags.
What if I forget the code?
Most fixed-code locks cannot be recovered without cutting. Write the code down and keep it in a secure place from the start.
Final Thoughts
Choose brass for durable outdoor use, aluminum for light and colorful everyday needs, zinc alloy disc for strong low-cost protection, and stainless steel disc for the harshest weather. Match the material to the setting, pick at least 4 wheels for valuables, and use a code that is hard to guess.
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Brass Combination PadlockProduct Features1. Pure brass lock body, rust-resistant and corrosion-resistant, with high-end texture and long service life.2. The shackle can be hardened, resistant to sawing and prying, safe and re...View More
Aluminum Combination PadlockProduct Features1. High-strength aluminum alloy integrated lock body, lightweight while maintaining a strong structure. The surface adopts an anodizing process, providing wear resistance and scratch r...View More
Zinc Alloy Disc Combination PadlockProduct Features1. High-pressure die-cast zinc alloy integrated lock body, with a dense internal structure without gaps. The surface is smoothly polished, providing a delicate touch without burrs;2. M...View More
Stainless Steel Disc Combination PadlockProduct Features1. Stainless steel material, excellent rust resistance and corrosion resistance, suitable for harsh outdoor environments.2. Precision combination mechanism, a large number of password ...View More
