--- product_id: 14922455 title: "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: "¥3276" currency: JPY in_stock: true reviews_count: 13 category: "Prime Line" url: https://www.desertcart.jp/products/14922455-u-10309-swing-bar-lock-for-hinged-swing-in-doors store_origin: JP region: Japan --- # Child-safe installation height 3.88-inch swing bar length Diecast zinc for durability 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:** ¥3276 **Availability:** ✅ In Stock ## Summary > 🔐 Elevate your door security game with style and smarts! ## Quick Answers - **What is this?** 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?** ¥3276 with free shipping - **Is it available?** Yes, in stock and ready to ship - **Where can I buy it?** [www.desertcart.jp](https://www.desertcart.jp/products/14922455-u-10309-swing-bar-lock-for-hinged-swing-in-doors) ## 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 - • **Child-Safe Peace of Mind:** Install out of reach to prevent little hands from unlocking, adding an extra layer of family security. - • **Sleek, Functional Design:** T-shaped swing bar folds neatly over the door, combining safety with subtle elegance. - • **Effortless Installation Included:** Comes with all fasteners and plastic shim spacers for a quick, hassle-free setup. - • **Secure Your Space with Precision:** 3.88-inch swing bar locks your door with a perfect balance of security and ventilation. - • **Built to Last, Designed to Impress:** Diecast zinc construction with a classic bronze finish ensures strength and timeless style. ## Overview The Prime-Line U 10309 Swing Bar Lock is a robust, diecast zinc security device designed for hinged swing-in doors. Measuring 3.88 inches in bar length, it allows safe ventilation while preventing unauthorized entry. Its classic bronze finish complements any door aesthetic, and the lock can be installed out of children's reach for added safety. Easy to install with included hardware and spacers, this durable lock offers reliable secondary security for homes and commercial spaces alike. ## 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 ## Technical Specifications | Specification | Value | |---------------|-------| | ASIN | B003ZGIEZY | | Best Sellers Rank | #24,539 in Tools & Home Improvement ( See Top 100 in Tools & Home Improvement ) #60 in Door Latches & Bolts | | Brand | PRIME-LINE | | Brand Name | PRIME-LINE | | Color | Classic Bronze | | Customer Reviews | 4.6 out of 5 stars 2,528 Reviews | | Exterior Finish | Bronze | | Global Trade Identification Number | 00049793103093 | | Included Components | Swing lock, keeper and fasteners | | Installation Type | Screw-In | | Item Dimensions L x W x H | 3.88"L x 3.88"W x 2.5"H | | Item Type Name | Swing lock | | Item Weight | 0.46 Pounds | | 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 Number | U 10309 | | Number of Pieces | 1 | | Product Dimensions | 3.88"L x 3.88"W x 2.5"H | | Recommended Uses For Product | Securing hinged swing-in doors, providing child-safe door security, and using it as a door closer in commercial settings | | Shape | T-Shaped | | Size | 1 Pack | | 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 ![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. ## Customer Reviews ### ⭐⭐⭐⭐⭐ Review *by B***R on November 1, 2025* ### ⭐⭐⭐⭐⭐ Review *by L***I on November 15, 2025* ### ⭐⭐⭐⭐⭐ Review *by C***W on April 2, 2020* --- ## Why Shop on Desertcart? - 🛒 **Trusted by 1.3+ Million Shoppers** — Serving international shoppers since 2016 - 🌍 **Shop Globally** — Access 737+ million products across 21 categories - 💰 **No Hidden Fees** — All customs, duties, and taxes included in the price - 🔄 **15-Day Free Returns** — Hassle-free returns (30 days for PRO members) - 🔒 **Secure Payments** — Trusted payment options with buyer protection - ⭐ **TrustPilot Rated 4.5/5** — Based on 8,000+ happy customer reviews **Shop now:** [https://www.desertcart.jp/products/14922455-u-10309-swing-bar-lock-for-hinged-swing-in-doors](https://www.desertcart.jp/products/14922455-u-10309-swing-bar-lock-for-hinged-swing-in-doors) --- *Product available on Desertcart Japan* *Store origin: JP* *Last updated: 2026-07-04*