Buying Guide

    The Anti-Theft Door Buyer's Checklist for Developers and Contractors

    7 August 2026 · 6 min read · WONLY
    The Anti-Theft Door Buyer's Checklist for Developers and Contractors

    For a developer or contractor, an anti-theft door order goes wrong in predictable ways: an unverified rating, a weak cylinder behind a thick leaf, a frame that fails before the door does, or a supplier who cannot document what they shipped. This checklist closes each gap before you sign.

    The 10-Point Checklist

    • 1. Verified burglar-resistance rating (EN 1627 class or GB 17565 grade) with the test certificate
    • 2. Multi-point locking — bolts engaging the frame on several edges, not just the lock side
    • 3. Anti-drill, anti-pick, anti-bump cylinder — the lock core is the most-attacked point
    • 4. Reinforced frame and strike — a strong leaf on a weak frame still fails
    • 5. Concealed anti-lift hinges so the door cannot be levered off its pins
    • 6. Cycle testing (200,000+ open/close) so hardware survives years of daily use
    • 7. Fire rating where the building code requires it (EN 1634, e.g. 60 or 90 minutes)
    • 8. Climate fit — corrosion-resistant construction for coastal and humid markets
    • 9. Certification pack for your destination market (ISO, CE, UL, regional approvals)
    • 10. Supplier substance — factory audit, production capacity, warranty and spare parts

    Why the Cylinder Deserves Its Own Line

    Most forced entries defeat the cylinder, not the slab. A standard figure-eight cylinder can be snapped or picked in minutes regardless of how thick the door is. Specify a tested high-security core — WONLY uses an industry-exclusive patented cylindrical lock core that resists technical opening far beyond the top national requirement and defeats drilling.

    Documentation to Collect Before Shipping

    • Test certificates for security grade and fire rating
    • Material and coating specifications in writing
    • Warranty terms and the spare-parts commitment
    • Compliance documents your customs and insurers will ask for

    FAQ

    What single check eliminates the most bad suppliers? Asking for the actual test certificate with the tested doorset configuration — traders and low-grade factories usually cannot produce one that matches the product offered.

    Do all openings in a project need the same specification? No — specify by exposure and code requirement per opening; that is where budget is saved without weakening security.

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