About Sturdy's Linkage Design

Damage-Resistant Linkage. Built To Take a Beating.

At Sturdy Safe, we’ve engineered a linkage system unlike any other RSC. By eliminating fragile clutches and shear pins—the parts most likely to fail under stress—we’ve removed one of the biggest failure points in traditional safes. Other safes are designed to break when force is applied, leaving you locked out and calling a locksmith. Not ours. With Sturdy Safe, there’s no risk of a costly locksmith visit from everyday mishaps like clamping down on a rifle strap or bumping the handle. The only time you’d ever need a locksmith is if you lose your combination or strike the dial hard enough to break it. To make this possible, we built our linkage and lock so strong that no amount of human force on the handle shaft can damage it. Combine that with up to 80% fewer moving parts than competing safes, and you get a system that’s over four times stronger than necessary—because reliability isn’t optional. * Fewer parts = fewer failure points * No clutches or shear pins to break * Extreme durability under real-world abuse

8 Inflexible, Fully Supported Deadbolts

Sturdy Safe’s deadbolt housing is engineered for strength and precision, ensuring all eight deadbolts stay perfectly aligned—no matter what’s in the way. Even under tremendous force, our 7/8" solid steel deadbolts won’t bend, shift, or lose alignment. With a combined shear strength of roughly 30,000 lbs, prying attempts are effectively useless.

Where other safes can jam or fail when a strap or rag gets caught in the door, Sturdy Safes remain unaffected. Competing safes often rely on clutches that slip under this kind of pressure—locking the owner out and requiring a locksmith. Our design eliminates that weak point entirely.

It’s not just about how many deadbolts a safe has—it’s about how well they’re supported. With 8 fully reinforced deadbolts, thick steel construction, and heavy welds, Sturdy Safe provides all the locking strength you need without gimmicks or exaggeration.

Prybar Video

How Sturdy Does Linkage

show an image of a 5ft tall gun safe and and it's owner trying to get in by pulling hard on the door. They even have their foot braced against the jamb to try to open it while pulling on the handle.

Proof That Linkage Problems Are Real — Just Check Their Warranties

You don’t have to take our word for it. Competitors reveal their weaknesses in their own warranties. Read the fine print and you’ll often find warnings like: “Do not slam the door. Extreme shock can damage the lock or jam the bolt work.” “Do not shut the door with the bolt work in the locked position. Damage to the bolt work may occur.” “Do not stack contents so the door must be forced shut. Jamming of the bolt work may result.” These aren’t just disclaimers—they’re admissions. If simple, everyday use can void a warranty, it means the linkage system isn’t built to withstand real-world handling. In fact, countless customer forums document linkage failures happening within days of purchase. That’s the reality many gun safe owners face. With Sturdy Safe, we’ve engineered a system that eliminates these weak points entirely, so you don’t have to baby your safe to keep it working.

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Maintenance-Free. Built to Last a Lifetime.

Sturdy Safe’s linkage system is designed to perform flawlessly for life—no servicing, no repairs, no surprises. We’re so confident in its strength that we back it with a lifetime linkage warranty. Even in high-traffic environments, like sheriff’s departments where safes are opened 20+ times a day, our linkage has maintained a perfect track record with zero failures. The only upkeep a Sturdy Safe owner might ever consider after more than a decade is a quick oiling of the deadbolts and hinges or replacing an electronic lock. That’s it. When we say “built to last,” we mean it.

Ultimate Warranty

show a 5ft tall gun safe with a burglar trying to break into a safe with it's dial busted off. The burglar is using a punch and a hammer in a hole where the dial was.

Drill & Punch Resistant Hardplate

Our 1/4" thick hardened hardplate is engineered to stop drill, punch, and manipulation attacks aimed at the combination box and relockers. Unlike welded on hardplates that can fracture at the seam, our hardplate floats in place, eliminating weak weld points and greatly increasing resistance to forced entry. Its oversized design protects the entire primary linkage—the combination box all the way to its source—so attackers can’t reach the mechanism even when they try to bore through the door. For customers who want maximum delay against locksmith-style attacks, we offer an Additional Hardplate Upgrade that doubles entry time. It's only recommended for those who believe burglars are so smart they know locksmith entries, which we have never seen in our whole history.

Premium Sargent & Greenleaf Locks — Reinforced for Maximum Strength

Every Sturdy Safe comes equipped with a UL-rated, Group II premium commercial combination lock by Sargent & Greenleaf (Model 6730-009). For those who prefer electronic access, we also offer S&G Type 1 Titan D-Drive locks—a high-end hybrid design that’s part mechanical for extended lifespan and long-term reliability. While not all S&G locks are created equal, these models deliver a level of quality most manufacturers skip to save costs. But at Sturdy, we don’t stop at the lock itself. Unlike other safe makers who rely solely on the lock’s deadbolt for security, we reinforce ours to withstand over 16,000 pounds of resistance pressure, making forced entry exponentially more difficult. We also strengthen the back of the combination box with a 10-gauge steel plate to defend against punching and manipulation attacks. The result is one of the most durable, abuse-resistant locking systems available anywhere. For added convenience, owners can easily change their own combination—no locksmith required.

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2 Independent Relock Systems — Smart Protection That Responds To Real Threats

Sturdy Gun Safe’s patented pressure-activated relocker is engineered to engage intelligently, making it incredibly difficult to defeat. Just as modern cars are designed to crumple in a controlled way during a crash, our relock system is designed to trigger only under the right amount of force—not from minor bumps or everyday use. Unlike sensitive spring or glass relockers used by other manufacturers, ours won’t accidentally lock you out over a simple mishap that would otherwise require a locksmith. When a real attack occurs, the relocker fires instantly and securely, locking the system down. And because it’s protected behind hardened steel, once engaged, it’s extremely difficult to bypass. A second independent relock is located in the Sargent & Greenleaf combination box, adding yet another layer of security.