--- product_id: 369318173 title: "PRIME-LINE Defender Security U 10307 4 In. Surface Bolt, Classic Bronze Finish (Single Pack)" brand: "prime-line" price: "100 zł" currency: PLN in_stock: true url: https://www.desertcart.pl/products/369318173-prime-line-defender-security-u-10307-4-in-surface-bolt store_origin: PL region: Poland --- # 4-inch solid brass bolt dual surface & mortise keepers easy DIY installation PRIME-LINE Defender Security U 10307 4 In. Surface Bolt, Classic Bronze Finish (Single Pack) **Brand:** prime-line **Price:** 100 zł **Availability:** ✅ In Stock ## Summary > 🔐 Lock in peace of mind with style and ease! ## Quick Answers - **What is this?** PRIME-LINE Defender Security U 10307 4 In. Surface Bolt, Classic Bronze Finish (Single Pack) by prime-line - **How much does it cost?** 100 zł with free shipping - **Is it available?** Yes, in stock and ready to ship - **Where can I buy it?** [www.desertcart.pl](https://www.desertcart.pl/products/369318173-prime-line-defender-security-u-10307-4-in-surface-bolt) ## 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 - • **Compact Yet Powerful:** 4-inch length fits discreetly while delivering reliable protection where you need it most. - • **Quick & Hassle-Free Setup:** Includes both surface mount and mortise-style keepers for flexible, fast installation. - • **Versatile Security, Your Way:** Mount vertically or horizontally to secure doors, cabinets, or closets effortlessly. - • **Child & Pet Proofing Made Simple:** Keep curious toddlers and pets safe by installing out of reach with confidence. - • **Built to Last with Classic Bronze:** Solid brass construction with a timeless finish that elevates your home’s aesthetic. ## Overview The PRIME-LINE Defender U 10307 is a 4-inch solid brass surface bolt lock featuring a classic bronze finish. Designed for versatile mounting—vertical or horizontal—it includes both surface and mortise keepers for flexible installation. Ideal for child and pet proofing, it offers durable security with quick, easy DIY setup. ## Description Whether you are trying to keep your toddler from opening the basement door, adding an attractive and functional enhancement to your closet doors or securing cabinets in your RV, the Prime-Line surface bolt is the versatile locking solution. Easy to install and constructed of durable solid brass, the 4 inch long surface bolt can be mounted horizontally or vertically and includes a surface mount keeper and a mortise-style keeper to accommodate a variety of applications. With a bronze finish, the surface bolt is not only effective, it’s attractive too. It’s a great alternative to traditional child (and pet) proofing products that can be hard to install and not complementary to your home décor. You can install the surface bolt out of the reach of curious little hands, so babies, toddlers and young kids cannot enter or exit into dangerous areas or go through cabinets and closets without supervision. ## Features - VERSATILE SURFACE LOCK – The U 10307 Surface Bolt can be mounted vertically or horizontally and is effective for keeping doors, cabinets and closets closed, deterring kids and pets from getting in or out from certain areas of your home, and so much more. - GREAT FOR CHILD PROOFING – The surface bolt lock is a great alternative to traditional products to baby and child proof your home. It can be installed out of the reach of inquisitive toddlers and adds a level of security to many areas of your home. Great for pet-proofing too! - EASY INSTALLATION – Installation is quick and easy! The surface bolt includes a surface mount keeper and a mortise-style keeper to accommodate a variety of applications. - DURABLE CONSTRUCTION – The surface bolt lock is constructed from solid brass with an attractive classic bronze finish. It is built to last. - PRODUCT INFO – The U 10307 Surface Bolt is 4” in length and includes two different keepers for surface or mortise installations. ## Technical Specifications | Specification | Value | |---------------|-------| | Manufacturer | Prime-Line Products (Home Improvement) | | Part number | U 10307 | | Item Weight | 90.7 g | | Product Dimensions | 1.91 x 10.16 x 4.11 cm; 90.72 g | | Item model number | U 10307 | | Size | 4 inches | | Style | Classic Bronze Finish | | Finish | Classic Bronze | | Material | Brass | | Item Package Quantity | 1 | | Included components | Slide Bolt | | Batteries Included? | No | | Batteries Required? | No | ## Images ![PRIME-LINE Defender Security U 10307 4 In. Surface Bolt, Classic Bronze Finish (Single Pack) - Image 1](https://m.media-amazon.com/images/I/51y+Betl94L.jpg) ![PRIME-LINE Defender Security U 10307 4 In. Surface Bolt, Classic Bronze Finish (Single Pack) - Image 2](https://m.media-amazon.com/images/I/51SandF3gHL.jpg) ![PRIME-LINE Defender Security U 10307 4 In. Surface Bolt, Classic Bronze Finish (Single Pack) - Image 3](https://m.media-amazon.com/images/I/71-o0S9IDXL.jpg) ![PRIME-LINE Defender Security U 10307 4 In. Surface Bolt, Classic Bronze Finish (Single Pack) - Image 4](https://m.media-amazon.com/images/I/610hZ-uHT-L.jpg) ## Available Options This product comes in different **Size, Style** options. ## Questions & Answers **Q: Can this work for double pantry doors? French doors?** A: I don’t think it would be the best for double doors. The sliding part of the latch goes in to the lock at a perpendicular angle, like a T, so it would best be mounted on a doorframe or wall rather than a second door. **Q: Can the bolt be slid out of the slide when moving it into the unlocked position? Or does it have a positive stop that prevent this?** A: Yes, it has a stop. It will not slide out in the unlocked position. ## Frequently Bought Together - Prime-Line U 10307 4 In. Surface Bolt, Classic Bronze Finish (Single Pack) - Amazon Basics Sturdy Rounded 5/8 Radius Interior Door Hinges, 3.5" x 3.5", 18 Pack, Matte Black - HOMOTEK 12 Pack Spring Door Stopper with Rubber Bumper Satin Nickel 3-1/8" Flexible Spring Heavy Duty Wall Door Stop Low Mounted Door Bumper for Home (Oil Rubbed Bronze) --- ## 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.pl/products/369318173-prime-line-defender-security-u-10307-4-in-surface-bolt](https://www.desertcart.pl/products/369318173-prime-line-defender-security-u-10307-4-in-surface-bolt) --- *Product available on Desertcart Poland* *Store origin: PL* *Last updated: 2026-04-26*