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🛠️ Level up your precision game—because every detail counts!
The Johnson Level & Tool 40-6184 Magnetic Torpedo Laser Level combines industry-leading ±1/8" accuracy with a durable anodized aluminum frame and versatile mounting options. Featuring four vial readings and three simultaneous 90° laser beams, it projects up to 100 feet with a strong magnetic base and tripod compatibility. Designed for professionals demanding precision and reliability, it offers up to 50 hours of battery life and comes with a protective carrying pouch and a 3-year warranty.

















| ASIN | B001IAYIPY |
| Best Sellers Rank | #47,839 in Tools & Home Improvement ( See Top 100 in Tools & Home Improvement ) #77 in Line Lasers |
| Brand Name | Johnson |
| Color | Silver & Black |
| Customer Reviews | 4.5 4.5 out of 5 stars (766) |
| Global Trade Identification Number | 00049448061846, 20049448061840 |
| Included Components | 40-6184 Includes > Laser, leveling base, 3 "AA" alkaline batteries, soft-sided carrying pouch |
| Item Dimensions L x W | 3.12"L x 9.87"W |
| Item Type Name | Torpedo Laser Dot |
| Item Weight | 9.07 g |
| Manufacturer | Johnson Level & Tool |
| Manufacturer Warranty Description | 3 Year Warranty: Johnson Level warrants this product against defects in material and workmanship for three years after the confirmed purchase date. At its option, the company will replace or repair the product if it fails under normal use. |
| Material Type | Aluminum |
| Operation Mode | Manual |
| Style Name | Square,Laser,Magnetic |
| UPC | 100076906944 049448061846 |
| Unit Count | 1.0 Count |
C**E
Great product
Multi directional laser is must have feature in a laser level, it’s made solid, works great, and extremely accurate from day one and believe I checked
J**K
Buy
Love it. Very strong and durable
J**Z
Un poco grande pero muy útil
P**.
One of the best tools in my toolbox
The magnet on this thing is serious! The lasers make squaring pipe an easy one man job. The vails I have found unreliable tho. I’ve had 2 and neither have matched my Milwaukee or other Johnson levels that all match each other
M**.
Works great.
1st one was faulty, they expedited a replacement. Works quite well (except) the dot is pretty big. Some workers liked that, I prefer a more precise beam. Also, the base takes some getting used to.
C**4
Accurate enough for me
I have learned the hard way that many measuring devices are not accurate enough to be useful for anything. My experience with levels has been no exception. My old laser torpedo level ceased operation and I needed a replacement. I chose the 40-6184 based on the fewer negative reviews and personal experience with my Johnson 24” beam level, which is accurate enough for my use. I purchased the level knowing there was a high probability I would return it. I was pleasantly surprised to find the horizontal accuracy acceptable. It is a 10” level and I had to place a .003” shim under one end to get the most accurate reading I could visually discern (flipping end to end). Projected to 10 ft that is about 1/32” error. Not perfect, but this is not a machine tool grade level. I am sure I introduce as much or more error in reading the level in a typical application. For the record, my 24” Johnson level needed .005” shimming. At 10 ft, that’s a bit under 1/32” error. The vertical level was off more than acceptable, but Johnson provides a calibration feature for it. I dialed it in to where I need it. Finally, I checked the y-axis laser accuracy relative to level. While the dot is larger than I would like to have, you just work to the center of it. I have an 8 ft surface flat to +/- .003”. The laser dot was spot on level over the 8 ft. I don’t have a reliable way to check the vertical and x-axis beam accuracy to the same confidence as the y-axis horizontal. I can’t speak to the durability and I agree with a previous review on the robustness of the laser switch. Its design quality does not match the overall craftsmanship of the level. Other than being heavy, I have no other complaints and recommend this level. Just check it for accuracy when you get it. There may be variation from batch to batch. If you don’t really need a laser, there are higher quality torpedo level options available in the same price range, but this was the best I could find in a laser torpedo level and I would have been willing to pay twice as much to get a better one. I give it 5 stars based on its performance relative to reasonable expectations for a laser level at this price point.
F**L
Me encanta, es bastante versátil. Lo puedo llevar en la maleta de viaje y siempre me saca de apuros.
D**N
Misleading information
Product stated gently used, but a upon receiving the item the threads that hold the batteries in or stripped and guarded up, so it does not hold batteries in, and you cannot tighten the battery holder up, so the lasers does not come on and it will not keep the batteries in
I**A
Es todo lo que esperaba Todo Calidad precio
D**R
Great tool for pipe fitters. I only use it a couple of times a year, but handy to have when required. Don't bother using the bubbles, they are no good. The lasers were a little off when I got mine, but was easy to calibrate using a small hex wrench.
P**.
Worked as expected
D**S
had one before but was stolen. fantastic for laying anything out
M**E
Had a different brand for 14 years before I left batteries in it too long and destroyed it. This one is identical so expect it to last longer provided I remember to remove batteries before they burst. This tool is invaluable to any tradesman or handyman who needs to perform high accuracy work where plum is important. Perfect to determine if chassis or trailer framing is twisted or out of square.
Trustpilot
1 month ago
1 day ago