Johnson Level & Tool 40-0921Self Leveling Laser Review


The Johnson Level & Tool 40-0921 Self Leveling Laser is a lower cost laser level but still has a lot to offer feature wise. It offers horizontal and vertical cross beams and comes with a tripod stand.  This is the perfect laser for any weekend DIY dads who are not looking for an over complicated highly priced laser level.  It is great for any situation where you simply need to level some lines without hassles.  We would recommend shopping for another laser if you are considering residential or construction work but for everyday light tasks this laser is perfect.

Technical Specs

This entry level laser comes standard with a tripod and laser enhancement safety glasses.  Its large round shape allows for 360 degree graduated base which rotates unlike its smaller competitors.  The self leveling pendulum locks when not in use for protection against hard knocks.  The unit is quick and easy to set up and self levels within +/- 6 degrees.  Very user friendly with a single on/off button for simple control of the laser level.  X and Y cross beams used for pin point leveling which are accurate for within ¼ inch at 35 ft.


Simultaneously projects vertical and horizontal cross beam lines in front of the device with a range of up to 100ft.  The laser comes with a kit which includes a tripod, safety enhancement glasses and an easy to read operators manual.  The 360 degree base allows for angle layout and the horizontal and vertical beams allow for easy alignment tasks.  The devices will automatically self level within 6 degrees and the locking mechanism helps to protect the laser when it is not in use.  One switch controls whether the laser is on or off making it very user friendly.   This laser is an llla class with an output of 5mW and is battery operated.


This device is not waterproof but comes with a sturdy hard sided carry case for transporting.  It is red in color and made from durable hard plastic.  The elevating tripod is made of lightweight aluminum metal and the laser beam is red in color making it highly visible indoors.  A visual indicator lets you know if you are off level.  It has a 24 hour repair or replacement plan on showing proof of purchase and 3 year Parts & Labor warranty.


Best used indoors.  Handy for tackling a wide variety of small scale building projects and home repairs or renovations.  Installing kitchen cupboards becomes an easy task with this laser by your side.   Use for hanging window trims or putting up a chair rail.  Mount your flat screen television in minutes in minutes or create an eye catching gallery picture wall in no time flat.  Designed for use on all types of interior leveling or alignment applications

Other Important Specs

Requires 3 AAA batteries and has a battery life of up to 12 hours which more than enough for the little jobs in and around the home.  The device weighs 1.2 pounds and measures 5 x 4 x 3.5 inches.  The laser has an indoor reach of 100ft depending on lighting conditions and the kit comes with a pair of tinted laser enhancement safety glasses. It is self leveling unlike other laser levels in its range.

Why We Liked It

The Johnson Level & Tool 40-0921 Self Leveling Laser is another Great option for home and small DIY projects in and around the house.  The cross beam laser makes an easy job of leveling vertical and horizontal surfaces simultaneously.  Works well indoors as well as outdoors and has an indoor range of 100 ft.   Battery operated and light weight, comes with an elevating tripod.

  • Affordable price
  • Horizontal and vertical cross line beams
  • Can be used indoors and outdoors
  • Comes with an elevating tripod

Leave a Reply

Your email address will not be published. Required fields are marked *