A cabinet business used this for professional measurements and only discovered afterwards that it was consistently about a quarter of an inch out. They paid for that in parts that had to be remade, wasted material, lost labour and repeat trips. That is the whole reason this page has no purchase link.
4.1 across 646 ratings is the weakest record of any budget unit we have written up, and the two most detailed negative reviews both come from people using it for a living. Plenty of owners are happy with it, so this is a judgement, and the reasoning is below.
| What the listing says | What owners report |
|---|---|
| Precision measurement | A cabinet firm found it consistently 1/4 in out |
| 393 ft / 120 m range | Not the complaint. Accuracy is |
| Dual laser, bilateral measurement | Works, and owners like the idea |
| Professional tool | Two trade users rated it 1 star |
| Nothing about mounting | No screw thread for a monopod or tripod |
| Nothing about durability | One construction pro reports the laser broke |
| Clear display | Not disputed. Owners like the screen |
One owner opened by saying they rarely leave negative reviews, and then explained that this product cost their business real money.
They found the laser measure inaccurate by approximately a quarter of an inch. They had trusted it for professional cabinet measurements and only discovered the error later. The consequences they list are specific: incorrectly manufactured parts, wasted materials, lost labour, repeat trips and unhappy customers. Their summing up is hard to argue with. A measuring tool has one job.
A second one star review comes from someone describing themselves as a construction industry professional, who found the device to be all bells and whistles and reported the laser itself breaking.
We recommend a Bosch on this site where one careful owner found three units reading about a tenth of an inch out, because that error was consistent, small, and correctable once you know about it. A quarter of an inch is four times the tolerance these tools claim, and in cabinetry it is the difference between a door that closes and one that does not. The deciding factor is not the number, though. It is that the business only found out after parts had been made. An error you discover on day one is an offset. An error you discover in a customer's kitchen is a liability.
This is a judgement call rather than a verdict, so the other side deserves setting out properly.
One owner who does a lot of measurements inside attics calls it easy to use and extremely reliable. Another describes it as accurate, fast, easy to use, with consistent readings, a clear display, and a body that feels lightweight but durable. They rate it great value.
Several others say simply that it is precise and easy to use.
We have no reason to doubt any of that, and it is entirely possible that unit to unit variation explains both sets of reports. But we cannot tell you which one you will receive, and the downside case here was documented by someone who paid for it in remade cabinet parts.
One four star review on this listing is worth quoting for what it reveals about product ratings generally. The owner explains where they attached the tether, and then adds that they have not used it yet, so they cannot say whether it is accurate.
That is four stars from someone who has not measured anything with it. It is not dishonest and the reviewer was upfront. But it is a reminder that an aggregate score is a blend of considered assessments and first impressions, and that the reviews describing what happened after six months of use are the ones worth reading.
It is also why we read the one and two star reviews sorted by helpfulness rather than trusting the average. Our method is set out here.
One owner rated it three stars purely because there is no screw mount hole for a monopod. On a unit advertising 393 ft that is a real omission, because hand shake at long range moves the dot several feet across the target and a mount is how you deal with it. Another simply found it hard to use.
Do not assume yours is affected. Check it against a tape at three distances, say five feet, ten feet and twenty feet.
If the error is the same at each, you have a correctable offset and a usable tool, provided you apply it every time. If the error grows with distance, or if it is anywhere near a quarter of an inch, keep it for rough estimating and do not put it anywhere near work that gets cut. The full procedure takes five minutes.
If you measure for a living. Do not buy at this price point for work that gets manufactured. The Bosch GLM165-40 has 5,846 ratings at 4.7 and displays sixteenths of an inch natively.
If you do cabinetry specifically. The Bosch GLM400CL is used by a cabinet installer who explains why measuring from the back of the tool is right for interior dimensions.
If you want the dual laser idea done properly. Huepar's dual units publish their accuracy honestly, including the fact that two way mode is looser than one way. The Huepar range is compared here.
If you want to stay cheap. The RockSeed two pack costs less and carries 22,354 ratings, with owners who have checked it against tapes at both close and long range.
Everything we have removed and why is listed on our method page.
You will find our top laser measure picks on the front page, ranked with the reason for each.