Ground-floor windows are the entry a locked door redirects people to · review
The only window lock here that fits two track widths, and the only one with a lining between the metal and your frame.
The conclusion Ten locks that fit two different track widths — up to 3/16 of an inch with the rubber insert, 3/8 without — which is the only one here that will do a whole house of mismatched sliding frames from one box. The vinyl lining is the other real feature: it keeps the screw from denting the track and grips a smooth rail that bare metal slides on. A dollar sixty a lock is the most expensive here, it clamps a track and nothing else, and no grade is published.
No grade. No force figure. No test standard.
Because a house rarely has one track size.
Sliding windows, patio doors, an extension’s aluminum frames — different sections, and a clamp sized for 1/8 of an inch will not tighten on a quarter-inch rail.
Up to 3/16 with the insert. Up to 3/8 without.
That spans most domestic sliding tracks, so a ten-pack can do everything rather than two sizes bought separately.
Measure the widest and the narrowest before ordering anyway.
And the grip half matters more than the scratch half.
A hardened aluminum screw tightened onto a soft aluminum or vinyl track leaves a line of dents down the frame.
Worse, a bare metal point on a smooth painted track can be slid along under force with the screw still tight. A soft liner deforms into the surface instead.
Both other locks on this shelf are metal on metal.
“A window lock whose key is in a drawer downstairs is a window that stays locked in a fire.”
A thumbscrew has no key. Nobody outside can reach it, because it sits on the inside track.
What it will not do is stop someone already inside loosening it by hand — which is what the keyed clamp on this shelf is for, and that is a childproofing argument rather than a security one.
Which is the whole point of a restrictor.
This shelf’s introduction: it holds the sash a few centimeters open for ventilation while resisting being pushed further. A ground-floor bedroom in summer.
Set the clamp where you want the sash to stop, and the window ventilates without opening.
On sale at around $16 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.
| Fitting | Tracks up to 3/16 in (4.8 mm) wide with the detachable rubber insert fitted, or up to 3/8 in (9.5 mm) without it — stated. It is the only lock on this shelf that covers two track widths, which matters in a house whose windows were not all fitted at once |
|---|---|
| Material | Heavy-duty aluminum with a vinyl lining, stated to prevent the lock scratching the window frame AND to provide additional gripping power. Both halves of that claim are real: a bare aluminum screw tightened onto an aluminum track marks it, and a soft liner grips a smooth track where metal slips |
| Operation | 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 |
| Ventilation | Holds the window fully closed OR ajar to allow a breeze — stated. This shelf's introduction calls that the compromise worth understanding: a restrictor holds the sash a few centimeters open while resisting being pushed further, which is what a ground-floor bedroom in summer needs |
| Frame | A rail clamp, so it fixes to nothing: it tightens onto the track. This shelf's introduction says aluminum frames often take only a clamp, which is exactly this — and it also means it will not serve a timber casement or find a vinyl reinforcement channel |
| Applications | Horizontal and vertical sliding windows, patio doors and sliding glass doors, plus securing a window air conditioner or a window fan in place, and camper locks — stated. The air conditioner use is named by this maker alone and is a genuine one |
| Supplied | Ten locks at fifteen dollars ninety-nine, about a dollar sixty each |
| Keying | None: there is no key and no keyed-alike option, so the buying tip's advice to key every window in the house alike does not apply. Nothing to key means nothing to lose |
| Security | A clamp resists the sash being slid, not the glass being broken. No grade, no force figure and no test standard appears, as on every lock on this shelf |
| Amazon reference | B0714BPVGM |
| EAN | 0647358814318 |
Because a house rarely has one. Sliding windows, patio doors and the aluminum frames on an extension or a conservatory come in different track sections, and a clamp sized for 1/8 of an inch simply will not tighten on a 1/4-inch rail. This lock covers up to 3/16 of an inch with the rubber insert in place and up to 3/8 without it, which spans most domestic sliding tracks — and it means one ten-pack can do the whole house rather than two sizes bought separately. Measure the widest and narrowest track before ordering anyway.
Against the attack it is for, yes — and this shelf's buying tip is the reason to prefer it. A track clamp stops a sliding sash being pushed or levered along its rail, which is how a sliding window is opened from outside; nobody outside can reach the thumbscrew, which is on the inside track. What a thumbscrew does not do is stop someone already inside loosening it, which is why the keyed clamp on this shelf exists for childproofing. And a lock with no key cannot be the window that stays locked in a fire.
Two useful things, and the second is the one that matters. It stops a hardened aluminum screw biting into a soft aluminum or vinyl track, which otherwise leaves a line of dents down the frame — cosmetic on a rental, annoying anywhere. More importantly it grips: a bare metal point on a smooth painted track can be slid along under force with the screw still tight, and a soft liner deforms into the surface instead. Neither of the other two locks on this shelf has a liner of any kind.
Between security devices of the same category and nearby price. Shown: what they all state. A half-filled column says nothing.
| Model | Price | Operation |
|---|---|---|
| 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 |
| 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 |
| ABUS FTS3003 | $60 | Locks by closing; key needed only to open |
Details checked on October 8, 2026.
A house with sliding windows of more than one track width, or a window air conditioner that must stay put
Amazon reports what buyers took in the month before this page was last checked: at least 500.
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.
