eSynic 12Pack Window Locks Child Safety Restrictor for UPVC (185mm) with Key & Lockable Cable

If you’re trying to make a room safer without turning windows into a hassle, these eSynic child window locks are a practical middle ground. They’re designed to restrict how far a window can open, while still letting you benefit from ventilation.

This 12-pack approach is handy if you’re kitting out a whole property rather than just one window. On paper, it’s also aimed at preventing “creative” openings from children and cats, with a lockable cable and key control for when you need full access.

What the eSynic window locks are for

These are child safety window restrictors that limit the maximum opening of UPVC windows, and they’re also described as suitable for wood, aluminium and PVC frames. The intention is straightforward: reduce the gap children can reach through or push too far, while still allowing airflow when you open the window within the restricted range.

In day-to-day use, the concept works like this: you close the window as normal, then set the opening so it’s not wide enough for risky gaps. When you need to open the window wider (for example, for cleaning or airing out after cooking), you can use the key to release the cable system.

What stands out in everyday use

The lockable safety cable system is the headline here. Instead of relying only on friction or a simple latch, the lock controls a stainless steel cable that helps keep the window opening within a safer limit.

A second detail worth noting is the low-profile design. The white, discreet look is meant to blend with window frames rather than turning the lock into an obvious visual feature.

There’s also a tamper-resistant angle: the description mentions a zinc alloy construction that resists bending, which matters in households where locks may get tugged or tested.

Installation reality check

Installation is described as straightforward but it does require a small drill hole. That’s not a deal-breaker for most people, but it is something to consider if you’re renting, if you can’t drill into the frame, or if you prefer a no-drill solution.

The pack is also pitched as “ready to fit” because it includes the screws for mounting. If you’re working across multiple windows, the multi-pack format helps you avoid stopping mid-job to track down fixings.

Strengths and potential limitations

What you’ll likely like: - A lockable cable system with key control for restricting opening when needed - Designed to allow airflow (so you’re not permanently sacrificing ventilation) - Discreet low-profile white finish - Multi-pack coverage, plus keys and screws included

What you may want to think about first: - It requires drilling during installation, so it may not suit everyone - Like most restricted-opening solutions, it’s about reducing risk rather than turning windows into fully secure, locked units at all times - The overall length is stated as 185mm, so if your window setup needs something different, it’s worth checking before committing

Who it suits (and who should skip it)

It makes sense if you’re trying to improve child safety around windows, or you have cats and want to reduce the chances of them getting into awkward gaps. It also fits well if you’re equipping multiple rooms in one go, because the 12-pack includes keys and screws.

It might not be the best match if you strongly prefer a non-drilling installation, or if your window frames don’t align with the sizes and mounting approach implied by a 185mm lock length. If you need a solution that allows unrestricted opening without any restriction during everyday use, this kind of restrictor may feel like more effort than it’s worth.

What’s included and what to check before buying

This 12-pack is described as including 12 window locks, 12 keys and 48 screws. Before you buy, it’s sensible to double-check: - That you’re happy with drilling a small hole for installation - That your windows are the kind of frames these locks are intended for (the description mentions UPVC, wood, aluminium) - The fit/setup for the stated 185mm length, especially if you’re planning to install on multiple window types

Is it worth it?

Worth considering if you want a key-controlled, lockable cable window restrictor for a whole property. It’s a solid “safety upgrade” approach: restrict the opening to reduce gaps for children and cats, but keep ventilation options when installed correctly.

Skip it if drilling isn’t an option for you, or if you’re looking for something that doesn’t require setting a limited opening range. It’s best seen as a sensible restriction solution, not a replacement for all other safety measures.

Quick questions people ask

FAQ

Do these window locks still allow airflow?

They’re described as restricting gaps while allowing airflow, so the idea is to limit how far the window opens rather than keeping it fully shut.

Is drilling required to install them?

Yes, the description states a small drill hole is needed for easy installation.

Are keys included for each lock?

The pack includes 12 keys, matching the 12 locks.

Can these locks be used on different frame types?

The description says they fit UPVC windows and also mentions wood and aluminium.

Are these meant for security as well as child safety?

The system is positioned as both a child safety device and a window security restrictor, by helping to limit window openings.