A high-security key is designed with advanced features such as sidebars, unique pin configurations, and other mechanisms that make the lock more resistant to picking, bumping, and drilling. These keys can typically be ordered or purchased from most professional locksmiths who carry the brand.

A restricted key, on the other hand, is tightly controlled by the manufacturer and can only be duplicated or supplied by a specific locksmith or locksmith business under contract with that manufacturer. In many cases, restricted cylinders also incorporate high-security features, providing both physical resistance and strict duplication control.

We support the common commercial and high-security key profiles used across Houston, and we evaluate each job on a case-by-case basis to ensure we have the correct blanks and authorization to perform the work. In practice that means we routinely service Allegion/Schlage profiles (including Schlage Primus, Everest 29, CX5, S123, C123), and we work with other manufacturer profiles where compatible blanks and authorization are available.

If you have a specific profile not listed here, bring the key or a clear photo of the head and bitting to our shop (or send the photo ahead). We will confirm compatibility and explain any manufacturer requirements before proceeding.

No — not always. Restricted and manufacturer-controlled keys are intentionally regulated to prevent unauthorized copying. Most reputable locksmiths (including us) follow the manufacturer’s authorization rules; many large retail chains do not carry the authorized blanks or are not permitted to cut patented/restricted profiles without documentation.

At Guardian Safe & Lock we require appropriate proof of authorization or ownership for restricted keys before duplicating. Where a manufacturer requires dealer authorization or special blanks, we will either perform the duplication after authorization is verified or advise you on the correct next steps. We document the authorization for your records to maintain a secure chain of custody.

If you have a specific profile not listed here, bring the key or a clear photo of the head and bitting to our shop (or send the photo ahead). We will confirm compatibility and explain any manufacturer requirements before proceeding.

High-security keys and their matched cylinders significantly increase resistance to picking, bumping, and other common attack methods compared with basic consumer locks. These systems use advanced keyway geometry, tighter tolerances, sidebar or sidebar-like mechanisms, and other anti-manipulation features that make picking and bumping much harder and less likely to succeed quickly.

That said, no single component is a perfect barrier. High-security cylinders are an important, effective layer of defense, but they work best as part of a broader security strategy (quality hardware, good installation, controlled key issuance, and sensible access policies). We will evaluate the full installation to recommend the most practical solutions for your risk profile.

Yes. Homeowners may absolutely request and use restricted or high-security keys. These systems are commonly used in residential applications where the owner wants stronger protection against unauthorized copying or more robust resistance to attack.

Be aware that restricted systems usually involve manufacturer controls, which means you or your property may need to provide proof of ownership or obtain authorization through an authorized dealer. If your home is in a managed community (HOA, condo association) or you rent, verify any rules about lock or hardware changes before making modifications. Our residential locksmith technicians can help you through the authorization and installation process.