10 Best Combination Locks 2025 in the United States

The Master Lock Gold Outdoor Combination Lock is designed for serious security needs, making it ideal for gates, sheds, and storage units. Constructed with a robust zinc body and a reinforced bumper, it offers significant strength and reliability. Weather resistance is a standout feature, with a shackle seal and covered dials to protect against the elements, ensuring durability in outdoor settings.

The octagonal boron-carbide shackle is exceptionally tough, being 50% harder than hardened steel, which enhances its resistance to cutting and prying. The lock’s dimensions provide a good balance of size and security, with a 3/8 inch thick shackle that fits a variety of applications. Setting and recalling the four-digit combination is straightforward, and the lock is resettable without needing a tool, adding to its ease of use.

The one-directional dial feature is a helpful addition for low-light conditions. However, the lock's weight, nearly 2 pounds for the pack, might be cumbersome for some users. Also, while the combination mechanism is user-friendly, it may not deter determined thieves as much as a keyed lock might. Available in a pack of two, it offers good value for securing multiple items. This lock is best suited for users who need a durable, weather-resistant padlock for outdoor use, and appreciate the convenience of a resettable combination.

The Master Lock Black Combination Padlock 647D is a suitable option for those in need of a secure, portable lock for items like luggage, backpacks, and gym lockers. It boasts a robust metal and steel construction which offers a level of cut resistance, enhancing security against tampering.

The lock's shackle measures 3/16 inches in diameter, providing a decent strength to resist cutting attempts. Additionally, the ability to set a personalized 3-digit combination offers convenience and eliminates the need for carrying a key. The lock lacks explicit weather resistance features, which might limit its durability in outdoor environments.

Its compact size and relatively light weight (2.82 ounces) make it easy to transport and fit into small spaces. The ease of setting and resetting combinations adds flexibility, but it may require careful handling to ensure combinations are not accidentally reset. The customer satisfaction rating of 4.4 out of 5 stars suggests that users generally find it reliable and effective for its intended use cases. Nonetheless, those seeking a lock for harsher conditions or more demanding security needs may want to explore other options with enhanced weather resistance and sturdier shackle thickness.

The Master Lock Brass Combination Lock with an extended shackle is versatile for both indoor and outdoor use, making it suitable for securing gates, sheds, and other properties. Constructed with a solid brass body and hardened steel shackle, it offers good strength and resistance to cutting, enhancing its durability. The 2-1/4-inch long shackle adds flexibility, allowing it to fit around a variety of objects and securing points, which is particularly handy for outdoor settings.

Users can set their own four-digit combination, making it easy to remember and eliminating the need for keys. This lock comes preset to open at 0-0-0-0, and a combination change tool is included for easy resetting, which can be convenient for personalized security settings. The weather resistance of the lock is suitable for outdoor use, providing protection against the elements, but it's important to note that extreme weather conditions might still impact its longevity.

With a 5/16 inch (8mm) shackle diameter, it offers a balance between security and ease of use. Some users might find the process of resetting the combination slightly cumbersome, and the brass finish, while aesthetically pleasing, might tarnish over time if exposed to harsh environments. The lock's portability and lack of battery requirements enhance its convenience, making it an ideal choice for those seeking a reliable and customizable security solution for both indoor and outdoor applications.