--- product_id: 52752355 title: "XFORT Viper Key Locking Cable Window Restrictor in White, Durable Window Safety Lock for Child Safety and Window Security" brand: "xfort" price: "€ 21.22" currency: EUR in_stock: true reviews_count: 13 category: "Xfort" url: https://www.desertcart.de/products/52752355-xfort-viper-key-locking-cable-window-restrictor-in-white-durable store_origin: DE region: Germany --- # Universal fit for all window types 1000N+ cut-resistant steel cable Multi-substrate screw fittings XFORT Viper Key Locking Cable Window Restrictor in White, Durable Window Safety Lock for Child Safety and Window Security **Brand:** xfort **Price:** € 21.22 **Availability:** ✅ In Stock ## Summary > 🔐 Lock in safety, unlock peace of mind. ## Quick Answers - **What is this?** XFORT Viper Key Locking Cable Window Restrictor in White, Durable Window Safety Lock for Child Safety and Window Security by xfort - **How much does it cost?** € 21.22 with free shipping - **Is it available?** Yes, in stock and ready to ship - **Where can I buy it?** [www.desertcart.de](https://www.desertcart.de/products/52752355-xfort-viper-key-locking-cable-window-restrictor-in-white-durable) ## Best For - xfort enthusiasts ## Why This Product - Trusted xfort brand quality - Free international shipping included - Worldwide delivery with tracking - 15-day hassle-free returns ## Key Features - • **Trusted Quality Brand:** XFORT delivers innovation and reliability, empowering your home safety with expert-backed products. - • **Sleek & Durable Design:** Corrosion-resistant white finish with covered screws blends seamlessly with modern interiors. - • **Child-Safe Window Control:** Limits window opening distance to prevent falls and unauthorized access—peace of mind guaranteed. - • **Unbreakable Safety Barrier:** Hardened steel cable resists cutting & force beyond 1000N for ultimate security. - • **Effortless DIY Installation:** Multi-substrate fixing screws and intuitive design make setup a breeze in under 10 minutes. ## Overview The XFORT Viper Key Locking Cable Window Restrictor is a robust child safety and security device featuring a hardened steel cable that withstands forces over 1000N. Designed for universal compatibility with uPVC, aluminium, wood, and metal windows, it restricts window opening to prevent falls and unauthorized entry. Easy to install with multi-substrate screws and corrosion-resistant for long-lasting protection, it’s a top-rated, trusted solution for homes and public buildings. ## Description Durable steel cable window restrictor limits opening distance to prevent falls and unauthorized access, ensuring a secure environment for homes and public buildings. Review: Brilliant product - simple instructions and took a matter of minutes to install - Value - the product, at the price I paid, was extremely good value. There were more affordable options available however there seemed to be a very obvious drop in quality and given their function I didn’t think this would be appropriate. Quality - the product appears to be of brilliant quality, more than enough for the average window. I’ve used a strong amount of force to open the window numerous times to test this, and no budging whatsoever. Installation - the instructions make it very simple, though the product itself is very intuitive and a common-sense approach can be applied. The first one took around 10 minutes, which included a little getting the feel for the product. The second took 5 minutes. There are 4 in the pack however I’m yet to install these. Appearance - the product looks high-quality, features nice covers for both screws. The product can’t be faulted on this in my opinion. There are various options dependent on the nature of the window in question Overall - I couldn’t recommend this product highly enough. It’s functional, sturdy, easy to install fitting very well and will undoubtedly serve its purpose. Review: Exactly what I was looking for - Excellent and very easy to fit. Huge variety online so can be difficult to work out the best options but these have been superb. Makes me feel very safe with the little ones rooms. Easy to install and simple unlock when needed. Great price too ## Features - FUNCTION: The key locking window restrictor is designed to limit the opening distance of windows, enhancing safety and security. Ideal for preventing child falls, unauthorized access, and complying with safety regulations, it ensures a secure environment in homes and public buildings - COMPOSITION: Crafted with a hardened steel cable, this window lock is resistant to cutting and can withstand forces exceeding 1000N. This child safety lock is designed to resist oxidation and corrosion, ensuring durability and longevity - APPLICATION: Suitable for all window types, including uPVC, aluminium, wooden, and metal profiles. This window guard is perfect for use in homes, schools, hospitals, and other buildings where child safety and security are paramount. - FITTINGS: Comes with multi-substrate fixing screws, allowing installation on various window types. The installation is straightforward, ensuring a secure fit for effective use as a window safety lock. - HANDING THE POWER TO YOU: XFORT is a brand synonymous with quality and innovation, that strives to make DIY more accessible and less intimidating to the everyday person. With expert guidance and quality products, our goal is to support your DIY journey every step of the way. ## Technical Specifications | Specification | Value | |---------------|-------| | ASIN | B00CTQ1LD8 | | Batteries Required? | No | | Batteries included? | No | | Best Sellers Rank | 2,786 in DIY & Tools ( See Top 100 in DIY & Tools ) 5 in Window Locks & Latches | | Colour | White | | Customer Reviews | 4.4 4.4 out of 5 stars (755) | | Date First Available | 16 May 2013 | | Item Package Quantity | 1 | | Item Weight | 160 g | | Manufacturer | Maher London Ltd | | Manufacturer reference | 8P-E4MB-KEOP | | Part Number | 8P-E4MB-KEOP | | Product Dimensions | 27.99 x 15.01 x 3 cm; 160 g | | Size | 20cm | ## Images ![XFORT Viper Key Locking Cable Window Restrictor in White, Durable Window Safety Lock for Child Safety and Window Security - Image 1](https://m.media-amazon.com/images/I/51n6YaxYPEL.jpg) ## Questions & Answers **Q: can you shorten the length of the cord to limit further how far the window can open?** A: No. Both ends are pre-terminated. Why do you want to shorten it anyway? Position the fitting to give you the opening width you want. **Q: Images have the lengths of the two screw in parts (40 & 65mm) what are the widths? TIA!** A: Hi - Sorry I have moved from the house I fitted this in - I can tell you it worked well though. **Q: Can these be used on Velux roof windows?** A: Icant see why not, just be careful where you fix the sash part, with screws, as you might crack the glass **Q: Could this be used to allow a french door to only open a few inches ?** A: it may be possible but it will not hold the door open . It would stop the door opening more than a few inches but any draughts or wind would cause the door to move . ## Customer Reviews ### ⭐⭐⭐⭐⭐ Brilliant product - simple instructions and took a matter of minutes to install *by A***J on 5 February 2025* Value - the product, at the price I paid, was extremely good value. There were more affordable options available however there seemed to be a very obvious drop in quality and given their function I didn’t think this would be appropriate. Quality - the product appears to be of brilliant quality, more than enough for the average window. I’ve used a strong amount of force to open the window numerous times to test this, and no budging whatsoever. Installation - the instructions make it very simple, though the product itself is very intuitive and a common-sense approach can be applied. The first one took around 10 minutes, which included a little getting the feel for the product. The second took 5 minutes. There are 4 in the pack however I’m yet to install these. Appearance - the product looks high-quality, features nice covers for both screws. The product can’t be faulted on this in my opinion. There are various options dependent on the nature of the window in question Overall - I couldn’t recommend this product highly enough. It’s functional, sturdy, easy to install fitting very well and will undoubtedly serve its purpose. ### ⭐⭐⭐⭐⭐ Exactly what I was looking for *by A***R on 10 August 2025* Excellent and very easy to fit. Huge variety online so can be difficult to work out the best options but these have been superb. Makes me feel very safe with the little ones rooms. Easy to install and simple unlock when needed. Great price too ### ⭐⭐⭐⭐ Pretty near perfect... *by R***E on 8 January 2022* This is a well made product with a plastic covered steel cable that should be strong enough to withstand any attempt to break it. It's dead easy to fix. However, I used my own screws as the screws that came with it were a bit too long and are intended to be impossible to unscrew. This is as a safety measure, although I don't imagine even the most intrepid child is up to unscrewing tightly fixed screws. One fact is that the plastic covers for the two parts you screw in are, once pushed over the metal parts, almost impossible to remove without breaking the covers. So again from a safety point of view it means children won't be up to that task either. But just make sure the two metal fixtures are screwed into exactly the right places before you push the covers over them. However, the positives well outweigh the slight negatives so don't let it put you off. I actually fixed two to each window, one on each side of the window, as an extra precaution as I was fitting these in high up windows for my grandson. I just wanted to be extra sure to keep him safe. There are cheaper types that look similar but the steel cable is thinner. Also, unlike the ones I'm reviewing here, some come with adhesive pads. NEVER use these, especially if securing a window that is high up and you have children. In my experience adhesive pads are simply not strong enough or are likely to just come off anyway, with what could be devastating results. ## Frequently Bought Together - XFORT Viper Key Locking Cable Window Restrictor in White, Durable Window Safety Lock for Child Safety and Window Security - BeeGo® Window restrictor - 1 Pc Self Adhesive Baby proofing Window Lock for upvc Window, Wooden, Metal, Aluminum Frames, No Tools or Drilling Window Safety Locks, Easy to Install, White - BABYGO® Magnetic Child Safety Cupboard Locks for Children 10 Locks, 2 Keys & 8 Free Corner Protectors Baby Proofing Kitchen Cabinets & Drawers Easy 30 Second Install (White, Child Safety Locks) --- ## 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.de/products/52752355-xfort-viper-key-locking-cable-window-restrictor-in-white-durable](https://www.desertcart.de/products/52752355-xfort-viper-key-locking-cable-window-restrictor-in-white-durable) --- *Product available on Desertcart Germany* *Store origin: DE* *Last updated: 2026-04-23*