Model#: BSHNGLM-20

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Bosch GLM-20 65 ft. Compact Laser Measure with Backlit Display

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Product Overview


The Bosch BLAZE GLM 20 laser measure is an easier, faster and more accurate way to measure. It delivers laser precision technology and real-time measurement mode, taking instant and reliable measurements up to 65 feet, so one person can size up the job in seconds.
Square and compact by design, the BLAZE GLM 20 laser measure is ready for anywhere portability. It has a backlit display for easy viewing, even in dark areas. The laser measure is simple to operate, so users need only press one button to get accurate measurements to within 1/8 in. and press again to hold the measurement.
  • Precise laser measure technology provides accuracy to 1/8 in.
  • Real-time measurement mode offers walk-off measurements from the wall and other surfaces
  • Backlit display offers easy and convenient viewing, even in dark areas
  • Pocket-sized for compact and convenient portability
  • 65 ft. Compact Laser Measure with Backlit Display - GLM 20
  • (2) AAA Batteries


Cordless: Yes
Width: 1.4 in.
Automatic Shutoff: Yes
Batteries Included: 2
Battery Type: AAA
Human Accessible Power Output: <1mW
Laser Hazard Class: Hazard Class 2
Measuring Accuracy: +/- 1/8 in.
Measuring Range: 65 ft.



4.4 / 5.0
12 Reviews
5 Stars
4 Stars
3 Stars
2 Stars
1 Star
Works fantastic!
Works as advertised and is a great quality product. The only issue I had is that I accidentally switched the units from Feet-inches to only inches! I did not know how to switch it back. Looked everywhere online and no one seemed to address how to toggle between units. Sooo... I finally figured it out. In the "off" position, press and hold the button. This will turn on the device but also begin to toggle between different units (ft-in, in, and m) Everything seems really easy in retrospect but it was pretty frustrating for a while. So for not being intuitive enough or providing instructions you lose a star. Otherwise, amazing, compact, reliable, product.
March 3, 2018
Originally posted at
Great product!
Bosch, you did an excellent job! Pay your techs a bonus! No more wasting time trying to measure. This boss laser tape does the work for me!
January 5, 2018
Originally posted at
Love this tool!
I bought my Bosch Professional GLM 20 several months ago and it is so easy to use! It’s so small I can carry it in my purse to use as needed. I did have a problem today when it switched from ft. / in to meters when I measured an outdoor space in the dark. I came in and did a search and found it a very simple fix. Simply turn it off, then turn it back on while continually holding the button. It will cycle between m/“/‘ “ (meters/inches/feet-inches. It’s now fixed!
December 1, 2017
Originally posted at
GLM 20
Great little tool. Accurate, light weight and easy to use.

Makes solo measures much easier
August 18, 2017
Originally posted at
What you'd expect from Bosch
I have owned this tool for a few months now and have to say I'm very pleased with the performance! I was a little gun shy at first having experienced the old sonic measuring devices and wild results in measurements you got from them so I was cautious about trying another non contact measuring device. I was pleasantly surprised by this tool! not only is it highly accurate its easy to use too! the laser makes it easy to line up where you want to take a measurement. If this one does happen to break I'd buy it again :-)
August 17, 2017
Originally posted at
Great in the tool bag
Reliable, easy to use. Better than a tape measure.
July 19, 2017
Originally posted at
i bought around one year and is perfect for my work. for accident i fall down two times from 25 ft and works perfect. i can guarantee that always work perfect.
July 18, 2017
Originally posted at
Saves time
Had it for over six months, I won't go to a job site with out it
June 20, 2017
Originally posted at
Easy to use and carry
Excellent tool for estimates and layouts. Extremely accurate, no need to stretch tapes across a brand new granite counter for a backsplash measurement!
June 19, 2017
Originally posted at
seems to work pretty well.
to connect strap/lanyard, open battery case, remove battery, and then string the lanyard thin part of strap into and back out of the battery area. then, loop the thick part of the strap thru the thin part to secure it...
December 31, 2016
Originally posted at

Questions & Answers

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Does the GLM-20 measure in metric and standard? Thanks
gene n on Nov 20, 2016
BILL A on Jan 30, 2018