--- product_id: 14922455 title: "Prime-Line U 10309 Swing Bar Lock for Hinged Swing-in Doors Secondary Security Lock, 3-7/8 in. Bar Length, Diecast Zinc Construction, Classic Bronze Finish (Single Pack)" brand: "prime-line" price: "R422" currency: ZAR in_stock: true category: "Prime Line" url: https://www.desertcart.co.za/products/14922455-prime-line-u-10309-swing-bar-lock-for-hinged-swing store_origin: ZA region: South Africa --- # Child-safe out-of-reach install 3.88-inch secure swing bar Diecast zinc for durability Prime-Line U 10309 Swing Bar Lock for Hinged Swing-in Doors Secondary Security Lock, 3-7/8 in. Bar Length, Diecast Zinc Construction, Classic Bronze Finish (Single Pack) **Brand:** prime-line **Price:** R422 **Availability:** βœ… In Stock ## Summary > πŸ” Lock in safety and styleβ€”because your door deserves the best. ## Quick Answers - **What is this?** Prime-Line U 10309 Swing Bar Lock for Hinged Swing-in Doors Secondary Security Lock, 3-7/8 in. Bar Length, Diecast Zinc Construction, Classic Bronze Finish (Single Pack) by prime-line - **How much does it cost?** R422 with free shipping - **Is it available?** Yes, in stock and ready to ship - **Where can I buy it?** [www.desertcart.co.za](https://www.desertcart.co.za/products/14922455-prime-line-u-10309-swing-bar-lock-for-hinged-swing) ## Best For - prime-line enthusiasts ## Why This Product - Trusted prime-line brand quality - Free international shipping included - Worldwide delivery with tracking - 15-day hassle-free returns ## Key Features - β€’ **Versatile for Home & Office:** Perfect for residential and commercial hinged swing-in doors needing secondary security. - β€’ **Secure Your Space with Precision:** 3.88-inch swing bar locks doors with controlled ventilation and safe viewing. - β€’ **Built to Last, Designed to Impress:** Diecast zinc construction with a classic bronze finish ensures strength and style. - β€’ **Child-Safe Security, Peace of Mind:** Install out of reach to prevent children from opening doors independently. - β€’ **Effortless Installation, Instant Protection:** Includes all mounting hardware and plastic shim spacers for quick, hassle-free setup. ## Overview 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. ## Description This Defender Security U 10309 Bar Door Lock is a security locking device for hinged swing-in doors, allowing a door to be slightly opened to allow safe viewing and ventilation. This door lock bar can also be installed out of reach of children so they cannot open the door by themselves, providing additional child-safe door security. Adding security bar locks for doors is quick and easy. All installation fasteners, including plastic shim spacers for leveling, are included. Strong, durable, and sure to last, these lock bars are constructed of zinc diecast with a classic bronze finish. This lock bar is 3-7/8 inch bar length by 2-1/2 inch height and has a long, hinged bar, which folds over the closed door to engage the catch. For further dimensional information, please see the line drawing. ## Features - SECURITY LOCK: This swing bar lock is a security locking device for hinged swing-in doors, allowing a door to be slightly opened to allow safe viewing and ventilation - CHILD-SAFE SECURITY DEVICE: This swing bar door lock can also be installed out of reach of children so they cannot open the door by themselves, providing additional child-safe door security - EASY INSTALLATION: Adding a security swing latch to your door is quick and easy; all installation fasteners, including 2 plastic 1/8 shim spacers for offset door jambs - STRONG AND DURABLE: Constructed of zinc diecast with a classic bronze finish, the security door lock is strong, durable, and sure to last - DIMENSIONS: This locking bar is 3-7/8 inch bar length x 2-1/2 inch height and has a long, hinged bar, which folds over the closed door to engage the catch; for further dimensional information, please see the line drawing - VERSATILE APPLICATION: Suitable for residential and commercial hinged swing-in doors requiring secondary security measures and controlled access - COMPLETE HARDWARE INCLUDED: Comes with all necessary mounting hardware and fasteners for immediate installation without requiring additional purchases ## Technical Specifications | Specification | Value | |---------------|-------| | 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 | ## Product Details - **Material:** Diecast - **Brand:** PRIME-LINE - **Color:** Classic Bronze - **Exterior Finish:** Bronze - **Product Dimensions:** 3.88"L x 3.88"W x 2.5"H ## Images ![Prime-Line U 10309 Swing Bar Lock for Hinged Swing-in Doors Secondary Security Lock, 3-7/8 in. Bar Length, Diecast Zinc Construction, Classic Bronze Finish (Single Pack) - Image 1](https://m.media-amazon.com/images/I/61WgHQ+aAqL.jpg) ## Available Options This product comes in different **Color** options. --- ## Why Shop on Desertcart? - πŸ›’ **Trusted by 1.3+ Million Shoppers** β€” Serving international shoppers since 2016 - 🌍 **Shop Globally** β€” Access 737+ million products across 21 categories - πŸ’° **No Hidden Fees** β€” All customs, duties, and taxes included in the price - πŸ”„ **15-Day Free Returns** β€” Hassle-free returns (30 days for PRO members) - πŸ”’ **Secure Payments** β€” Trusted payment options with buyer protection - ⭐ **TrustPilot Rated 4.5/5** β€” Based on 8,000+ happy customer reviews **Shop now:** [https://www.desertcart.co.za/products/14922455-prime-line-u-10309-swing-bar-lock-for-hinged-swing](https://www.desertcart.co.za/products/14922455-prime-line-u-10309-swing-bar-lock-for-hinged-swing) --- *Product available on Desertcart South Africa* *Store origin: ZA* *Last updated: 2026-07-16*