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🔐 Lock in safety and style—because your door deserves the best.
The Prime-Line U 10309 Swing Bar Lock is a robust secondary security device for hinged swing-in doors, featuring a 3.88-inch diecast zinc bar with a classic bronze finish. It allows safe door ventilation and viewing while preventing unauthorized entry, including child-safe installation options. Complete with all necessary hardware and easy-to-install design, it’s ideal for both residential and commercial use.




























| ASIN | B003ZGIEZY |
| Additional Features | Child-Safe Viewing and Ventilation |
| Best Sellers Rank | #30,762 in Tools & Home Improvement ( See Top 100 in Tools & Home Improvement ) #76 in Door Latches & Bolts |
| Brand | PRIME-LINE |
| Brand Name | PRIME-LINE |
| Color | Bronze |
| Controller Type | Hand Control |
| Customer Reviews | 4.5 out of 5 stars 2,533 Reviews |
| Finish Types | Classic Bronze |
| Global Trade Identification Number | 00049793103093 |
| Included Components | Swing lock, keeper and fasteners |
| Item Dimensions | 3.88 x 0.88 x 2.5 inches |
| Item Type Name | Swing lock |
| Item Weight | 0.46 Pounds |
| Item dimensions L x W x H | 3.88 x 0.88 x 2.5 inches |
| Lock Type | Non-Keyed Lock |
| Manufacturer | Prime-Line Products (Home Improvement) |
| Manufacturer Part Number | U 10309 |
| Manufacturer Warranty Description | Goods are warranted against manufacturing defects for 1 year. |
| Material | Diecast |
| Material Type | Diecast |
| Model Name | Swing Bar Door Guard |
| Model Number | U 10309 |
| Number of Pieces | 1 |
| Recommended Uses For Product | Securing hinged swing-in doors, providing child-safe door security, and using it as a door closer in commercial settings Recommended Uses For Product Securing hinged swing-in doors, providing child-safe door security, and using it as a door closer in commercial settings See more |
| Shape | T-Shaped |
| Smart Home Compatibility | Not Smart Home Compatible |
| Special Feature | Child-Safe Viewing and Ventilation |
| Style Name | Classic |
| UPC | 049793103093 |
| Unit Count | 1.0 Count |
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