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Model #21408

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Polysteel 400 Heavy Duty 440 Lumen Storm Proof LED Flashlight with Twist Focus

  • Storm Proof, drop-proof and crush-proof design for lasting use
  • Constructed from a durable stainless steel core and poly outer
  • Backed by Coast's lifetime warranty for your satisfaction
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Product Overview

If you work or play in an environment that puts constant stress on your equipment, then look no further than the Polysteel® line of flashlights. The middle size of the collection, the Polysteel® 400 Flashlight is storm proof, drop proof and crush proof while possessing our Pure Beam® Optics System with twist focus to make the light ultra-durable and ready to weather any storm. With a stainless steel core and a poly outer, we put this light to the test and it passed each one with style. With Coast's commitment to quality, the Polysteel® 400 Flashlight is impact resistant, storm proof, crush proof, drop proof, and its LED is virtually unbreakable. The Polysteel® 400 Flashlight is backed by Coast's lifetime warranty against defects in materials and workmanship. Tested and rated to ANSI/FL1 standards.
  • Pure Beam® focusing optic
  • Twist Focus™
  • Storm proof, crush proof, drop proof
  • Drop proof from a height of 3 meters
  • Crush proof with a durable fiberglass-reinforced polymer over a stainless steel core
  • High:medium:low light modes
  • Light output: high 440-Lumens; low 41-Lumens
  • Beam distance: high 210 m; low 60 m
  • Run time: high 3 hours; low 29 hours
  • Uses 4 x AAA (included)
  • Backed by Coast's lifetime warranty
  • Click here for more information on Electronic Recycling Programs

Info & Guides

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NameG25 330 Lumens BULLS-EYE™ Spot Beam LED FlashlightPolysteel 400 Heavy Duty 440 Lumen Storm Proof LED Flashlight with Twist FocusPX1 480 Lumen LED Flashlight with Twist FocusPolysteel 700 Stormproof 790 Lumen Dual Power LED Flashlight with Dual Color (White/Red) C.O.B.
Power SourceBatteryBatteryBatteryBattery
Flashlight FeaturesBulls-Eye Spot Beam Optic,Impact Resistant,Water ResistantHigh/Low Switch,Impact ResistantFocusable,Impact Resistant,Pure Beam Focusing Optic,Twist Focus,Water ResistantC.O.B. Optic,Dual Power,Focusable,Impact Resistant,Magnetic Backing,Pure Beam Focusing Optic,Rechargeable,Red Light,Twist Focus,Water Resistant
Beam Intensity (Candelas)455711808288014906
Battery SizeAA BatteryAAA BatteryAAA BatteryAA Battery
Max Beam Distance (m)130 m210 m107 m260 m
Casing materialAluminumPlasticAluminumPlastic
IncludedBatteriesBatteries,No additional components or accessories are includedBatteriesBatteries
Light ModeStandardStandardStandardRed,Standard
View ProductView ProductView ProductView Product



Product Depth (in.)
5.75 in
Product Height (in.)
1.5 in
Product Width (in.)
1.5 in


Battery Size
AAA Battery
Beam Intensity (Candelas)
Bulb Type
Casing material
Color Family
Color Family
Distance (ft.)
Flashlight Features
High/Low Switch,Impact Resistant
Flashlight type
Hardware Color Family
Batteries,No additional components or accessories are included
Light Mode
Max Beam Distance (m)
210 m
Number of Batteries Required
Package Quantity
Power Source
Product Weight (lb.)
0.4 lb
Protective Features
Crush Proof,Impact Resistant
Run Time on High Setting (hrs.)
Safety & Security Product Type
Flashlights & Accessories

Warranty / Certifications

Certifications and Listings
No Certifications or Listings
Manufacturer Warranty
Backed by Coast's lifetime warranty

Questions & Answers

Typical questions asked about products:

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Customer Reviews

  • 4.6
    out of 291 reviews
  • 92% recommend this product
Filter by:
Showing 1-10 of 291 reviews
Quality you don’t see anymore.
This is the brightest, toughest, and useful Flashlight I’ll ever own I’m sure of it.
  • Verified Purchase
  • Recommended
Really bright light for the size and waterproof which is good for work because I work in places w...
Really bright light for the size and waterproof which is good for work because I work in places with large open vats and a lot of water around. I did have a situation recent where it didn't turn on so pulled batteries thinking the ones it came with were dead but they all had 1.4 volts. Put batteries back in a couple button pushes later it started working again. Other than that so far so good.
  • DIY
  • Verified Purchase
  • Recommended
Horrible, Don't Buy
Worked for about one hour and then it got water in lens
    Heavy Duty LED Flashlight
    Coast PS400 Waterproof Focusing Flashlight is a heavy duty fist size LED flashlight and the covering is textured for a good grip . The on button is on the end and does not require you to fully engage it to get a burst of light. It’s ipx8 rated and that’s a big deal. That rating starts at 1 and goes to 8 = Meaning you drop it in your hot tub or your pool and it takes a while to find it you are OK. Focus goes from beam to flood with 3 levels of brightness and uses 4 of the smaller batteries the AAA.. It's got a place to run a lanyard or something similar from to hang it on or about something or someone. I can recommend this to anyone that needs a durable dependable flashlight. I can say dependable because its built like a tank and has a lifetime warranty. That's a long time.
    2 people found this helpful
    Lights the way
    Perfect smaller light to pack in a glovebox, backpack, or bedside drawer. Lightweight, but sturdy as well. Solid construction and feel in my hand. One nice bonus is that the included batteries are Duracells, not some cheap no-name that goes dead in a week. And considering the battery size (4 AAA's), lasting about an hour at full intensity is pretty good. Normally the 2nd or even 3rd setting will be more than enough anyway. Changing from spot to flood is as simple as twisting the lens housing. You can do it with one hand. And distance is phenomenal. I was shining into my neighbors dining room a few doors down the block. In my video, even at lowest intensity I was still able to shine light up into the tree. Unfortunately it doesnt show well on the video, but it was a nice surprise to see it reach that far at low power.
    • Recommended
    1 person found this helpful
    Way better than a bulb!
    This is my first "large" LED flashlight, and it is still about half the size of an old style light. LEDs are way brighter and take less battery power to do it. It took a minute to figure out the flood vs. spotlight. Just keep clicking the button on the end. Each click changes the light intensity. Twist the head to adjust the flood, and the base to remove the battery pack, same as with a mag-lite. It came loaded with four Duracells, not the usual cheap "starter" batteries many products have. The package says waterproof to three meters. This will be my new bedside drawer flashlight. Great size, bright and fits perfectly in the hand.
    • Recommended
    1 person found this helpful
    Chunky and super bright
    This may be one of the brightest flashlights I own. When focused it resembles the brightness, distance and clarity of my halogen spot lamp. I can shine it at night into the woods behind my house and it provides a similar level of light as my much larger, much hotter running spotlight. It's a well made, chunky flashlight. The tail cap switch is large and easy to actuate, and the studded grip is comfortable. You can focus the lens by twisting the front of the flashlight. It's fairly tight to turn / focus, which I like. It will not move / roll around on its own. The wide area light is interesting. It is a solid, uniform light with no halo effect like you normally get in any xenon, krypton or even halogen bulb lights. When you focus it, you get a very bright innner beam with a lighter halo around it, but still a uniform halo that provides decent area coverage. My only issue with the flashlight is the instructions. It has the ability to run at three different light output levels, which is quite nice. The high output level is bright, but it can be too bright for some indoor work. Plus, the lower output levels save battery life significantly. The tail cap switch has a three-step function, cycling between high, medium and low as you turn it on and off again. If you wait for a short period of time (ten seconds, maybe) it will stop cycling through the power settings and just turn on at the high output level again. But the instructions do not explain any of this. The only thing on the instructions is a table of output power (lumens) and respective battery life. I had to figure out the three-way switch on my own.
    • Recommended
    3 people found this helpful
    The COAST Poly Steel 400 LED flashlight is a high quality and really bright light that boasts some really nice features. It has three brightness settings ( high, medium and low ) plus it has a twist focus front that allows you to adjust the light from a ultra view flood beam for up close lighting to a bulls- eye spot beam for distance illumination. The PS 400 is also waterproof, crushproof and drop proof like the larger LED flashlights in the poly steel series from COAST. The body of the light has a steel core and a poly casing that surrounds the core to give the flashlights there durability. The small size, 375 lumen brightness and comfortable feel make this LED flashlight a good light to keep in a glove box, tool box or in a night stand for use when ever you need to illuminate an area. I have tossed this flashlight into a sink of water for hours, It has fallen out of my pocket at the top of my cellar stairs, and still works flawlessly.
    • Recommended
    3 people found this helpful
    Focus Up
    Having flashlights on hand is always smart, especially when you have a power outage. A standard run of the mill flashlight is enough for most things, but sometimes reaching for the higher end one is worth it. Enter the Coast PS400. It's very durable, has a good solid heft to it, and has a nice contoured shape that fits easily in the hand. Its size is nice and small and the material is a smooth rubber like plastic. You can tell that this thing is rugged just by how it feels and it's waterproof capability is an added bonus. For it's size, this thing can put out some serious light. It has an articulating focus aperture, allowing for a broad floodlight effect or a focused, concentrated spot light. Even the twisting travel on the articulating section of the flashlight feels good - you can tell this product has been manufactured well. It comes with a small loop hole for belt attachment as well as batteries. This is a flashlight to keep around and maybe take with you boating or driving if there's an emergency.
    • Recommended
    2 people found this helpful
    Great Light in a Compact Package
    This is my second Coast flashlight & I'm even more impressed with this one than the first. First priority for any flashlight is that it needs to be bright, and this flashlight certainly is. It can easily illuminate the side of a building over 275 feet away. The focus of the beam is easily adjustable, and after testing this flashlight in a sink full of water, I can confirm that this model is in fact waterproof. For comparison: this model is slightly larger, feels more rugged and is brighter than my PX45. I've had that model for over 4 years & have continued to be impressed with it. Only tiny downside I found when comparing these two models is that the PX45 came with a nice lanyard and this one doesn't (though it does have a spot for one). Again, only a tiny downside. Definitely recommend!
    • Recommended
    4 people found this helpful
    Showing 1-10 of 291 reviews