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.
  • Class 2 Laser Product, < 1mW Power Output, Wavelength 635 nm
  • Backlit display offers easy and convenient viewing, even in dark areas
  • Real-time measurement mode offers walk-off measurements from the wall and other surfaces
  • 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
Laser Class: 2
Measuring Accuracy: +/- 1/8 in.
Measuring Range: 65 ft.
Output Power: <1mW
Wavelength: 635 nm



4.5 / 5.0
22 Reviews
5 Stars
4 Stars
3 Stars
2 Stars
1 Star
Yes, I would recommend this to a friend (1)
Easy To Use (1)
Ergonomic Design (1)
Value (1)
Lightweight (1)
Best Uses
Small Projects (1)
Home Repair (1)
Bought this less than a year ago. Worked great until I let the apprentice borrow it and broke the screen. Now it’s useless.
July 29, 2019
Originally posted at
Solid, Easy to Use, Git'er done!
Picked it up to measure some windows and it did a great job. Wish I bought one sooner! Great that you can go from feet and inches, to inches, to meters and can also hold your last measurement in case you can't read it after measuring. I've heard good things about this and I agree with them. Great work, Bosch!
July 19, 2019
Originally posted at
Yes, I would recommend this to a friend
Easy To Use
Ergonomic Design
Best Uses
Small Projects
Home Repair
Worth it
Works very well -- no set up only choose feet inches, inches or metric for display. Compact design and easy to see laser mark.
July 6, 2019
1 month ago
Describe Yourself:
Avid Do-it-Yourselfer
Extra Features
Only used a few times so far but it works well. I didn’t realize it had so many conversions when I purchased. I accidentally switched it from feet/inches and took me a few minutes to figure out how to change it back. My only complaint is that it does not work great outdoors as the laser is hard to see in the sunlight.
July 1, 2019
Originally posted at
Easier to use than my last Bosch measuring device
Just replaced my earlier device (left the batteries in for too long and destroyed it). Much easier to use this simpler to use model. One negative is it did not include a carrying case like the old model. Fortunately, the old carrying case fits the new model. Now keep the batteries in the case, but outside the device until ready to use.
May 24, 2019
Originally posted at
Typical Bosch Quality
Easy to use, accurate measurements- I am a happy customer.
May 24, 2019
Originally posted at
Spot-on accurate
Received as a gift a put it to work just after checking its accuracy, which was spot-on. Highly recommend!
May 23, 2019
Originally posted at
Nice tool to have
This is a good tool, I trust Bosch with this kind of tools, no problem so far
December 6, 2018
Originally posted at
Great tool!
I use it everyday for work and it works great. It is everything you say
October 5, 2018
Originally posted at
Excellent measuring tool
I love this tool. I work in the heating and air industry and we have to measure distance in attics and crawl spaces daily. It takes two people to use a tape measure and takes a lot of time. The GLM 20 takes the measure instantly and the visible laser is bright so you can be spot on. Plus we don't have to crawl around in the dirt or balance on the rafters in attics. The only thing negative is it doesn't come with a lanyard. It has a place to put a lanyard, so I found one off an old camera and put it on. I would not take an expensive tool like this on a job site without a lanyard.
September 7, 2018
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