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Products > Jobsite-Storage-Equipment > Jobsite Storage > Chest > Model 4830 JOBMASTER® Chest, 25.25 cu ft > 4830

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Model 4830 JOBMASTER® Chest, 25.25 cu ft


The Model 4830 KNAACK® JOBMASTER® Chest measures 30 in wide by 48 in long and has a capacity of 25.25 cu ft. It is versatile, portable and can hold anything from hand and power tools to compressors and features a full length piano hinge, stacked and welded to resist break-in attempts. The size is ideal for a personal box on a jobsite or added security inside a trailer.


  • Uses Accessory Tray Model 31
  • WATCHMAN® IV Lock System 3-point latch with recessed lock housing for protection against theft
  • Additional reinforcement between the lock and the side housing
  • Bigger, better hinges offer stronger protection against pry-ins
  • Power Pass® Electrical Pass-Thru grommet provides easy, weatherproof power cord access
  • Four-way skids allow access from any side, making it easier and faster to transport
  • Powder-coat finish for superior durability and corrosion resistance
  • Closed height 34-1/4 in
  • Open height 61-1/4 in


FeatureSize / Details
Approx. Product Height34.25 in
Approx. Product Width30 in
Approx. Product Length48 in
Approx. Shipping Weight Lbs.194
Approx. Cu. Ft. Per Unit25.25
Closed Height34-1/4 in
Max. Open Extended Height61-1/4 in
Electrical AccessPower Pass® Electrical Pass-Thru
Lock SystemWATCHMAN® IV Lock System
Powder Coat FinishYes

Package Contents

Part NumberQtyDescription



Additional Chest Models

Model No.Approx. Product HeightApprox. Product WidthApprox. Product LengthApprox. Shipping Weight Lbs.Approx. Cu. Ft. Per UnitClosed HeightBuy Online
101036 in30 in66 in4003136 in
203218.25 in19 in32 in77518-1/4 in
204828 in24 in48 in1451628 in
206028 in24 in60 in1802028 in
247228.25 in24 in72 in21624.528-1/4 in
306837.625 in30 in60 in2253128 in
3218.5 in19 in32 in84518-1/2 in
3621.5 in19 in36 in97721-1/2 in
4223.375 in19 in42 in114923-3/8 in
482428.25 in24 in48 in1581628-1/4 in
483034.25 in30 in48 in19425.2534-1/4 in
4830-D35 in30 in48 in2541734-1/4 in
6028.25 in24 in60 in19020.2528-1/4 in

Model 4830 JOBMASTER® Chest, 25.25 cu ft is rated 5.0 out of 5 by 2.
Rated 5 out of 5 by from Pride and Joy I have a KNAACK model 42 which I have had since I started as a Ironworker helper, since then its always kept my tools safe, dry, organized, plus my work wear. Its been through many seasons over the years but I've always kept it clean, was always asked if id get a new one but I'd say no because its my pride and joy, Because sure its old and wearing slowly but nothing comes close to its strength. I don't want to win a new toolbox, just to say that I have a KNAACK and its the best equipment I've ever owned.
Date published: 2015-09-02
Rated 5 out of 5 by from 5 Stars its great u can put alot tools an stuff in the box an its big.
Date published: 2015-09-02
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Model 4830 - How close can it be to a wall and still open?

I need to bolt a 4830 box to a work deck. How close can be to a wall and still open the top all the way?
Asked by: Patrick
The cover should sit at a 90 degree angle. You would need about 4.5" between the box and the wall to open the cover.
Answered by: Werner Customer Care
Date published: 2017-08-04

how much does this box weigh empty?

Asked by: Anonymous
192 pounds
Answered by: Werner Customer Care
Date published: 2017-05-11

can the 4830 be fitted with the crane lift accessory kit?

Asked by: OKS
Yes you can mount the crane lift on the 4830.
Answered by: Werner Customer Care
Date published: 2015-03-18

Template for bolt holes on legs

Is there a template available that provides a layout of the bolt holes in the legs? I'm planning on mounting the Model 4830 on a concrete slab and would like to put threaded rod into the concrete at the correct positions.
Asked by: MikeD
we do not have a pre made template. you can use the skid of the box to make your own template
Answered by: Werner Customer Care
Date published: 2017-03-14

What gauge steel are the walls and lid?

Asked by: Anonymous
The 4830 chest is manufactured with 16 gauge steel
Answered by: Werner Customer Care
Date published: 2016-12-06

Does it come with heavy duty casters?

Asked by: Kenny
The 4830 doesn't come with caster. You will have to order them separately. Caster model number 495, 695, 516 and 600 will all work.
Answered by: Werner Customer Care
Date published: 2016-12-05

Are the Sesamee K436 combination locks equivalent or compatible with the 4830 Jobmaster chest?

Asked by: Jesse
We recommend using the Masterlock #5 or American #50.
Answered by: Werner Customer Care
Date published: 2017-11-03

What is the NMFC# used for this Knaack Box 4830?

I know the freight class is 85 but what is the NMFC# used for this specific Knaack Box? All I'm able to find on the web would consider this a Metal Tool Box NMFC 39790-08 Freight Class 85 but I'm not sure if this is correct.
Asked by: SNACKS
The class (85) is used for billing purposes by the carriers. The NMFC, is a description of what falls into that category, So 29790 would equate to something about metal boxes.
Answered by: Werner Customer Care
Date published: 2016-11-08

what size masterlock fits this box

Asked by: Phil
Please go to the following link, for the installation instructions and lock size required: https://s3.amazonaws.com/wernerco.content/WEB_PDF/Knaack/Boxes/14-0008_RevF.pdf
Answered by: Werner Customer Care
Date published: 2017-11-14

weather protective for electric tools?

Asked by: mike
Our boxes are weather/moisture resistant.
Answered by: Werner Customer Care
Date published: 2017-06-10
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