Robustline Door Chain Guard Lock with Double Locking System, BT-0010C, Stainless Steel, Antique Copper

The Robustline BT-0010C Door Chain Guard Lock in antique copper finish is a security auxiliary device intended for use on doors to provide controlled partial opening (for ventilation or visitor screening) while maintaining safety. It features a double locking system, meaning there is a primary chain latch plus a secondary locking mechanism that reinforces the security when the door is slightly opened. The body is constructed from a durable alloy (often copper alloy or stainless + copper plating) and is finished to resemble antique copper-offering an elegant patina with a warm metallic tone that complements classic or rustic décor. The finish also helps in resisting surface corrosion and wear, preserving aesthetics over time. When installed, the chain guard allows the door to open partially while still restricting full access. The extra (“double”) lock gives you extra protection in case an intruder tries to force through - even if the chain is partially compromised, the second locking feature helps delay or prevent full breach. Mounting is typically surface installation using screws. It can be mounted on doors that swing inward or outward, depending on side alignment. The lock is suitable for wood, metal, or composite doors, adding a discreet but effective security upgrade without replacing the main lock.

• High-quality door chain double lock system with easy installation
• Stainless Steel material for long life and perfect security for your home door
• Comes with mounting screws; straightforward surface-mount installation without complex tools
• Offers an elegant, classic look that conceals fingerprints and matches traditional hardware styles
• Can be fitted on swing-in or swing-out doors depending on configuration and mounting orientation
• Works as a supplemental security device rather than replacing existing locks