![]() ![]() Mobile combination locks will inevitably be smaller and more lightweight: no bigger than 3 inches, with shackle diameters between 5/16 and 1/4 inch. Size and Weightīigger and bulkier isn’t necessarily better when it comes to combination locks, so consider whether you want a grab-and-go model or something that will serve a more stationary purpose, like securing your backyard shed. Hardened steel and boron steel offer slightly more strength, while boron carbide and molybdenum steel alloy are the strongest combo lock shackle materials available. Brass and stainless steel are the weakest shackle materials, but if you’re buying for portability and value, brass and steel may be all there is to find. The shackle (the part that physically locks/unlocks) is typically made of brass, stainless steel, boron carbide, or molybdenum steel alloy. Metal lock bodies are slightly stronger but can leave scratches and dings on surfaces. These are rugged materials that will stand up to the elements, so they’re a wise choice for doors and gates. Most lock bodies (the part that houses the locking pins and cams) will be made of either weatherproofed plastic and vinyl or some kind of metal derivative. ![]() In other words, balance the lock’s risk of breaking or being busted versus the comfort and convenience it will afford you. So while you may not want to lug a hefty, hockey puck-sized lock to the gym, it may be worth your while to err on the side of caution with a tougher look if you’re going to keep your wallet in your locker. Some locks are small and lightweight for portability, but anything too flimsy might invite a breach. To choose the best combination lock for your purposes, think about what you need to keep secure-and where. Single and multi-dial combination locks are the most recognizable designs, used for everything from luggage and lockers to doors and sheds. As you dial in the code, several lock pins interact with notches cut into the cams when each lock pin is successfully set into each cam notch, the lock can be opened. In one of the most standard designs, a series of rotating discs (called cams) make up the internal components. Risk LevelĪ combination lock is a common security device that uses a series of letters, numbers, or other symbols as a personalized code to lock/unlock the shackle. Cheap materials and poor design can lead to potential theft, so keep the following important factors and key features in mind when shopping. When shopping for a combination lock, the sheer number of choices can be daunting. Photo: What to Consider When Choosing the Best Combination Lock
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