Ground-floor windows are the entry a locked door redirects people to · review
The only window lock on this shelf that needs a tool to release — which is both its security and the fire risk the hub warns about.
The conclusion Eighty-three cents a lock for twelve is less than half what anything else here costs, and the real difference is the tightening key: this is the only clamp on the shelf that cannot be loosened by hand, which is what you want on a child's window. It is also the one the hub's fire warning applies to literally, so keep a key at each window rather than in a drawer. Rails up to 1/8 of an inch only, no liner, and the reference says DD04-10 on a 12-pack.
No liner. No ventilation position stated. No grade.
Which is the most important thing on this page.
It fits a hole in the body to tighten and loosen the screw. It does not make the lock pickable or unpickable.
What it means is that the clamp cannot be undone with fingers — and that is precisely the difference between this and the two thumbscrew locks on this shelf.
For a child’s bedroom window, or a ground-floor room where a teenager loosens a lock and forgets, that is the right design.
This shelf’s buying tip: a window lock whose key is in a drawer downstairs is a window that stays locked in a fire.
This is the only lock here that needs a tool to release.
So the tool lives where the window is. Taped inside a nearby cupboard, hung behind a curtain — reachable in the dark, invisible through the glass.
Twelve locks arrive with keys. Put one by each window that matters, and not all of them in a kitchen drawer.
Less than half the price per lock of anything else on this shelf.
Twelve locks for ten dollars. Three finishes, and pack sizes up to thirty.
A thirty-pack is the largest quantity named anywhere here.
The narrowest range on this shelf, and the commonest track.
Three point two millimeters covers most standard aluminum sliding windows and patio doors.
It will not cover a heavier commercial track or a thicker extruded rail — another lock here goes to 3/8 of an inch.
NUK3Y says to measure first, which all three makers on this shelf say. A clamp that will not tighten is twelve locks wasted.
On sale at around $10 on the American Amazon store at the time of checking.
Prices and availability are what Keepa reported on the date this page was updated; both move.
Prices quoted in this text were read on October 8, 2026. The live price is at the top of the page.
| Operation | Tightened with a supplied key inserted into a hole in the body — stated, with no additional tools required. That key is a TIGHTENING TOOL rather than a lock key, and the distinction is the whole character of this product: it cannot be loosened by hand, which no thumbscrew clamp on this shelf can say |
|---|---|
| Fitting | Railings up to 1/8 in (3.2 mm) thick, stated, with an instruction to check the window track dimensions before purchasing. One eighth of an inch is the narrowest range on this shelf, where another lock covers up to 3/8 in |
| Material | Sturdy rust-resistant aluminum alloy, stated. No liner, so metal tightens directly onto the track |
| Frame | A rail clamp fixing to nothing: it tightens onto the track. This shelf's introduction says aluminum frames often take only a clamp, which is what this is — and it will not serve a timber casement or a vinyl frame |
| Supplied | Twelve locks at nine dollars ninety-nine — about eighty-three cents each, less than half the price per lock of anything else on this shelf |
| Range | Offered in aluminum, black and white finishes, and in 8, 10, 12, 15 and 30 packs — stated. The 30-pack is the largest quantity named anywhere on this shelf |
| Reference | The product reference reads DD04-10 while the title reads 12 Pack. Given that NUK3Y names five pack sizes including a 10 and a 12, confirm the quantity on the order page |
| Ventilation | Not described. The lock secures onto the track, which allows a ventilation position by where it is placed, but unlike the other two locks on this shelf NUK3Y does not state that the window can be held ajar |
| Security | No grade, no force figure and no test standard, as on every lock on this shelf |
| Amazon reference | B0FBHRHH4G |
| EAN | 0626143099499 |
No, and the distinction is the most important thing on this page. The key is a tool that fits a hole in the lock body to tighten and loosen the screw — it is not a lock cylinder and it does not make the lock pickable or unpickable. What it does mean is that the clamp cannot be undone with fingers, which is exactly the difference between this and the two thumbscrew locks on this shelf. For a child's bedroom window or a ground-floor room where a teenager might loosen a lock and forget, that is the right design.
To this lock, literally. The tip above says: a window lock whose key is in a drawer downstairs is a window that stays locked in a fire. This is the only lock on this shelf that needs a tool to release, so the tool has to live where the window is — taped inside a nearby cupboard, hung behind a curtain, somewhere reachable in the dark and not visible through the glass. Twelve locks arrive with keys; put one by each window that matters and do not put them all in a kitchen drawer.
It is the commonest domestic sliding track section, and it is the narrowest range on this shelf. Three point two millimeters covers most standard aluminum sliding windows and patio doors; what it will not cover is a heavier commercial track or a thicker extruded rail, and another lock on this shelf goes to 3/8 of an inch. NUK3Y says to check your window track dimensions before purchasing, which is the right advice and the same advice all three makers here give. Measure first, because a clamp that will not tighten is twelve locks wasted.
Between security devices of the same category and nearby price. Shown: what they all state. A half-filled column says nothing.
| Model | Price | Operation |
|---|---|---|
| NUK3Y PRODUCTS K3 DD04-10 sliding window security locks, aluminum, 12-pack | $10 | Tightened with a supplied key inserted into a hole in the body — stated, with no additional tools required. That key is a TIGHTENING TOOL rather than a lock key, and the distinction is the whole character of this product: it cannot be loosened by hand, which no thumbscrew clamp on this shelf can say |
| PRIME-LINE U 9819 sliding window security lock, 1/8 in rail, 4-pack | $5 | A thumb turn screw tightened onto the window track, with no tools and no permanent modifications — stated. Keyless, which this shelf's buying tip makes a safety argument for: there is no key to be in a drawer downstairs |
| Shop Square LLTR10 adjustable aluminum window stoppers, 10-pack | $16 | A thumb screw, tightened by hand with no tools — stated. Keyless, which this shelf's buying tip makes a safety point about: a window lock whose key is in a drawer downstairs is a window that stays locked in a fire. A thumbscrew has no key to lose |
| ABUS FTS3003 | $60 | Locks by closing; key needed only to open |
Details checked on October 8, 2026.
A ground-floor window or a child's room, where nobody inside should be able to loosen it by hand
Amazon reports what buyers took in the month before this page was last checked: at least 300.
The figure is a floor, rounded by Amazon, and read through Keepa — it says what buyers picked, not what a maker claims.
Specifications: the manufacturer sheet for home security products and the matching Amazon product page. Prices and availability: Keepa. Every figure on this page names its source.
Hinge-side lock · bolt rated to one metric ton of pressure · ABUS level 10 · 123 × 42 × 86 mm (4.84 × 1.65 × 3.39 in)
A hinge-side security bolt for inward-opening windows — the side almost nobody reinforces. ABUS states the bolt protects up to one metric ton of pressure and rates it at security level 10 on its own scale.
Best for: The half of the window that every other lock in this hub ignores.
≈ $68
Bolt lock, inward-opening windows · 4-pin cylinder · keyed alike · ABUS level 5 · key to open only
A bolt-action window lock for inward-opening windows and French windows. ABUS states a four-pin cylinder, keyed-alike operation, and a mechanism that locks by pushing — the key is needed only to open it.
Best for: Ground-floor windows that get locked every night, where hunting for a key each time would end the habit.
≈ $60
Five window locks · push-button, no key · M5×50 screws supplied · white
The five-unit box of BASI's keyless window bolt, for a house with more accessible windows than a three-pack covers. Same push-button mechanism and same 50 mm (1.97 in) screws.
Best for: A house with five or more reachable windows — usually a front, a back and a side.
