Best Heavy Duty Combination Locks of 2026

The Master Lock Heavy Duty Weatherproof Combination Lock is perfect for outdoor use like gates, sheds, or storage areas. You can set your own four-digit combination and recall it easily without any tool. It is constructed with a zinc body and reinforced bumper for strength and reliability. The shackle is 50% harder than hardened steel and the roller pin cylinder provides maximum pick and pry resistance. The lock body is 2-1/4 inches wide and the shackle is 3/8 inch in diameter with a 1-1/2 inch length and 15/16 inch width. The lock comes with two heavy-duty combination locks.

The Master Lock Outdoor Combination Lock M175XDLF, also known as the Master Lock Outdoor Padlock, is a heavy-duty and weatherproof lock designed for outdoor use. This lock is perfect for securing gates, sheds, and storage units. With its set-your-own combination feature, you can easily recall your four-digit code without the need for any special tools. The shackle seal and hinged dial cover provide superior weather resistance, ensuring the lock remains functional even in harsh conditions. Constructed with a zinc body and reinforced bumper, this padlock is built to withstand heavy use and provide maximum security. The tough-cut octagonal boron-carbide shackle is 50% harder than hardened steel, making it highly resistant to picking and prying. The Master Lock Outdoor Padlock also features a one-directional dial for low light applications. With a wide lock body and an extended shackle, this lock offers flexibility in various applications.

The Master Lock Outdoor Combination Padlock is ideal for securing gates, sheds, and storage lockers. This zinc body padlock features a resettable four-digit combination lock that is easy to remember, and a back-up key is included for extra convenience. The covered dials and reinforced body bumper provide superior weather protection, and the roller pin cylinder and Tough-Cut octagonal boron-carbide shackle offer maximum pick and pry resistance. The padlock has a 2-inch wide body and an extended shackle for application flexibility.

The Master Lock ProSeries Combination Lock is designed for indoor and outdoor use, offering keyless convenience with a resettable 4 dial combination that allows up to 10,000 personalized codes. Its ergonomic dials with a blind feature permit easy operation with gloves, in low light or complete darkness. The lock has a solid brass body for extreme corrosion resistance, stainless steel shackle with a seal and dust cover for protection, and a deadlocking mechanism to safeguard against prying, shimming, and Rap attacks. With a 2-1/4" wide body, a 5/16" diameter shackle, and 2-1/16" length, the padlock is ideal for construction sites, equipment, manufacturing environments, and other industrial applications.

The Master Lock Disc Padlock is a high-security combination lock designed for outdoor use. With its Tough-Cut octagonal boron-carbide shackle, it provides 50% more hardness than hardened steel, making it extremely difficult for thieves to break. The shackle is fully shrouded, minimizing exposure and protecting against bolt cutter attacks. The reinforced body bumper adds scratch resistance, ensuring durability even in harsh conditions. The set-your-own 4-digit combination feature offers convenience and security with 10,000 possible combinations. This padlock is ideal for securing storage units, sheds, garages, trailers, and more, providing peace of mind and reliable protection for your belongings.

Diyife Heavy Duty Combination Padlock, also known as Diyife Outdoor Padlock, is a high-security padlock suitable for both indoor and outdoor use. With its one-piece lock body and 304 stainless steel locking beam, this padlock is designed to prevent shearing and prying. It has undergone over 180 hours of salt spray testing, proving its resistance against harsh conditions. The one-button locking design allows for easy and convenient use, with the original password set as 0-0-0-0. The hidden password feature enhances its concealment, and the anti-error design prevents accidental password changes. Made of high-quality stainless steel, this padlock is secure, anti-theft, waterproof, snowproof, and rustproof, making it suitable for various applications such as gardens, fences, warehouses, gates, garages, and lockers. The simple and elegant square shell design, along with the anti-skid texture, provides a comfortable grip. Weighing only 270g and compact in size, it is easy to carry around. With a 45-day money-back guarantee and 12-month worry-free service, Diyife Heavy Duty Combination Padlock is a reliable choice for both personal use and gifting.

The DELSWIN 4-Digit Disc Combination Lock Outdoor is a durable and versatile lock made of stainless steel 304, offering anti-rust, anti-drilling, and anti-prying features. Its waterproof and rustproof construction with a slide button and keyless dial ensures smooth operation in all weather conditions. With 10,000 possible combinations, this lock is more secure than traditional 3-digit locks. Its 70mm diameter and 22.5mm thickness make it ideal for use on storage units, gates, trailers, and more. The exceptional customer service team provides a 12-month worry-free guarantee.

The Diyife Outdoor Combo Lock offers a strong and reliable solution for securing your belongings both indoors and outdoors. Its heavy-duty design features a solid one-piece body and a tough 304 stainless steel shackle, making it resistant to cutting and prying. You can trust it to withstand harsh weather, as it passed a rigorous 180-hour salt spray test. The lock uses a convenient one-touch unlocking system—simply press the middle button after entering your code to open it quickly. For added security, the password is hidden at the bottom and can be changed easily, preventing accidental code changes. This lock is a practical choice for protecting your gym locker, garden gate, or garage door.

The NovLock 4-Digit Combo Lock is designed for both indoor and outdoor use, making it perfect for securing everything from lockers to gates and sheds. Its durable zinc alloy body and hardened steel shackle protect against impact and tampering, giving you reliable security. You can easily open it with one hand using the front-facing dials and a simple push button—no keys to worry about. Plus, this lock is built to withstand harsh weather and corrosion, so you can count on it to keep your belongings safe in any season or environment.

The Locilot Heavy Duty Combo Lock offers strong protection with its reinforced stainless steel and zinc alloy body, making it tough against cutting and rust. You’ll appreciate the smooth operation thanks to a factory-lubricated shackle and easy-to-use 4-digit combination wheels that rotate both ways, so setting your code is simple. Its long 105mm shackle fits thicker gates, lockers, and chains, while the corrosion-resistant finish keeps it reliable even in harsh weather like rain or snow. Plus, the keyless design means you don’t have to worry about losing keys, making it perfect for outdoor use and shared spaces.