--- product_id: 19495065 title: "Prime-Line U 9912 Keyed Chain Door Guard, 3-1/4 In., Steel and Diecast Construction, Brite Brass-Plated Finish (Single Pack)" brand: "prime-line" price: "S$35" currency: SGD in_stock: true category: "Prime Line" url: https://www.desertcart.sg/products/19495065-prime-line-u-9912-keyed-chain-door-guard-3-1 store_origin: SG region: Singapore --- # Corrosion-resistant brass finish Keyed lock for secure access Durable steel & diecast build Prime-Line U 9912 Keyed Chain Door Guard, 3-1/4 In., Steel and Diecast Construction, Brite Brass-Plated Finish (Single Pack) **Brand:** prime-line **Price:** S$35 **Availability:** βœ… In Stock ## Summary > πŸ”’ Elevate your home security with style and peace of mind! ## Quick Answers - **What is this?** Prime-Line U 9912 Keyed Chain Door Guard, 3-1/4 In., Steel and Diecast Construction, Brite Brass-Plated Finish (Single Pack) by prime-line - **How much does it cost?** S$35 with free shipping - **Is it available?** Yes, in stock and ready to ship - **Where can I buy it?** [www.desertcart.sg](https://www.desertcart.sg/products/19495065-prime-line-u-9912-keyed-chain-door-guard-3-1) ## 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€’ **Easy DIY Setup:** Includes all hardware and installs in minutes with just a Phillips screwdriver. - β€’ **Secure Keyed Access:** Keep control with a precision B1 keyway lock that only you can open. - β€’ **Heavy-Duty Steel Chain:** Welded alloy steel chain ensures robust security and long-lasting durability. - β€’ **Child-Safe Installation:** Mounts out of reach to prevent little ones from opening doors unsupervised. - β€’ **Elegant Brass-Plated Finish:** Adds a polished, corrosion-resistant look that complements modern interiors. ## Overview The Prime-Line U 9912 Keyed Chain Door Guard combines heavy-duty alloy steel construction with a corrosion-resistant bright brass finish, offering a secure keyed locking mechanism that allows safe door ventilation and viewing. Designed for inward-swinging hinged doors, it installs easily with included hardware and keeps children safely inside by mounting out of reach. This stylish yet functional door guard is a trusted, cost-effective alternative to alarm systems, delivering peace of mind and enhanced home security. ## Description This chain door guard is constructed of a steel chain, diecast housing, plate and keeper, and it comes in brass-plated finish. This lock engages by allowing the bolt to slide into the keyed mechanism to lock, and it uses a B1 keyway, ILCO (1098M). This chain door lock allows a door to open slightly for safe viewing and ventilation. Installation of this lock placed out of children’s reach will help prevent them from opening a door themselves to enter or exit into dangerous areas. All installation fasteners are included, and it can be used on a variety of door types, on or beside the door casing. ## Features - This Chain Door Guard is a security locking device that allows doors to slightly open for safe viewing and ventilation - All components come in a beautiful, corrosion resistant, bright brass-plated finish - Designed for use on hinged entry doors that swing inward, into the dwelling - Mounts out of children's reach to help prevent them from opening a door themselves to enter or exit into dangerous areas - Easy to install, key-operated lock can be mounted on, or beside the door casing, mounting hardware included - Durable welded steel chain with a bolt that slides into keyed mechanism to lock. Uses B1 keyway, ILCO (1098M) - A Phillips head screwdriver is required for installation - Please refer to the line art drawing for dimensions and compare with your needs before ordering ## Technical Specifications | Specification | Value | |---------------|-------| | ASIN | B000R9YY9W | | Additional Features | Key Lock | | Best Sellers Rank | #45,939 in Tools & Home Improvement ( See Top 100 in Tools & Home Improvement ) #490 in Door Latches & Bolts | | Brand Name | PRIME-LINE | | Color | Brass | | Controller Type | Hand Control | | Customer Reviews | 4.5 4.5 out of 5 stars (2,278) | | Finish Types | Brass | | Global Trade Identification Number | 00049793099129 | | Included Components | Hardware; Door Knobs & Lock Sets;door-chains | | Item Dimensions | 1.38 x 3.25 x 1.37 inches | | Item Type Name | Prime-Line U 9912 Keyed Chain Door Guard, 3-1/4 In., Steel and Diecast Construction, Brite Brass-Plated Finish (Single Pack) | | Item Weight | 9.6 ounces | | Lock Type | Keyed | | Manufacturer | Prime-Line Products (Home Improvement) | | Manufacturer Part Number | U 9912 | | Manufacturer Warranty Description | Goods are warranted against manufacturing defects for 1 year. | | Material Type | Alloy Steel | | Model Name | U 9912 | | Model Number | U 9912 | | Number of Items | 1 | | Number of Packs | 1 | | Number of Pieces | 1 | | Recommended Uses For Product | Door security, child safety, ventilation, and viewing | | Shape | Rectangular | | Style Name | Modern | | UPC | 049793099129 | | Unit Count | 1 Count | ## Product Details - **Brand:** PRIME-LINE - **Item dimensions L x W x H:** 1.38 x 3.25 x 1.37 inches - **Lock Type:** Keyed - **Material:** Alloy Steel - **Special Feature:** Key Lock ## Images ![Prime-Line U 9912 Keyed Chain Door Guard, 3-1/4 In., Steel and Diecast Construction, Brite Brass-Plated Finish (Single Pack) - Image 1](https://m.media-amazon.com/images/I/61AhtgU-ERL.jpg) ![Prime-Line U 9912 Keyed Chain Door Guard, 3-1/4 In., Steel and Diecast Construction, Brite Brass-Plated Finish (Single Pack) - Image 2](https://m.media-amazon.com/images/I/41q-v+X3o-L.jpg) ![Prime-Line U 9912 Keyed Chain Door Guard, 3-1/4 In., Steel and Diecast Construction, Brite Brass-Plated Finish (Single Pack) - Image 3](https://m.media-amazon.com/images/I/51P92CttqzL.jpg) ![Prime-Line U 9912 Keyed Chain Door Guard, 3-1/4 In., Steel and Diecast Construction, Brite Brass-Plated Finish (Single Pack) - Image 4](https://m.media-amazon.com/images/I/41bUz4VSYxL.jpg) ![Prime-Line U 9912 Keyed Chain Door Guard, 3-1/4 In., Steel and Diecast Construction, Brite Brass-Plated Finish (Single Pack) - Image 5](https://m.media-amazon.com/images/I/51oegLSLxiL.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.sg/products/19495065-prime-line-u-9912-keyed-chain-door-guard-3-1](https://www.desertcart.sg/products/19495065-prime-line-u-9912-keyed-chain-door-guard-3-1) --- *Product available on Desertcart Singapore* *Store origin: SG* *Last updated: 2026-09-30*