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Model 42 JOBMASTER® Chest, 9 cu ft


The Model 42 KNAACK® JOBMASTER® Chest measures 42 in long and has a capacity of 9 cu ft. It is versatile, portable and can hold anything from hand and power tools to compressors and features a full lenth 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 41
  • WATCHMAN® IV Lock System 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
  • Heavy-duty 16-gauge steel construction with fully arc-welded seams
  • Powder-coat finish for superior durability and corrosion resistance
  • Four-way skids allow access from any side, making it easier and faster to transport.
  • Closed height 23-3/8 in
  • Open height 39-3/8 in
  • Caster-ready 14-gauge steel skids to accommodate optional casters
  • Recessed handles for positive gripping even with gloves on


FeatureSize / Details
Approx. Product Height23.375 in
Approx. Product Width19 in
Approx. Product Length42 in
Approx. Shipping Weight Lbs.114
Approx. Cu. Ft. Per Unit9
Closed Height23-3/8 in
Max. Open Extended Height39-1/2 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 42 JOBMASTER® Chest, 9 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 42 Inside Dimensions

What are the inside dimensions for the Model 42 box? Thank you
Asked by: rlambert94
Here are the following ​dimensions:​ The height from bottom to the ​top end it is 18 1/8".​ The width between the end ​panel hem return is 39 27/32".​ The width between the end ​panel handle recess is 39 ​1/8".​ The width of the inside of ​end panels is 42".​ The width between front and ​back end panel is 17 1/8".​ The from the back to lock ​system is 16 1/6".​
Answered by: Werner Customer Care
Date published: 2017-07-08

do you offer this item without the skids?

Asked by: Anonymous
Unfortunately we do not offer the box without skids.
Answered by: Werner Customer Care
Date published: 2015-09-30

Re: looking for hydrolic closer for Knaack 42

Hi. I know there are special hardware to accommodate hydrolic closure for job box. Will it work on a 42" box? My friends 4824 has a hydrolic closure that came with it. Aloha
Asked by: Aaron
We do not offer a gas strut for the model 42
Answered by: Werner Customer Care
Date published: 2017-08-07

I have generator that is 24 l x 18.5h x 18.5 deep. What is smallest box that will work for me?

Need minimum interior dimensions on all boxes.
Asked by: Trav
The 42 only has a height of 18" so we would not suggest using this model. The 4824 is 23" high, 24" deep, and 48" long.
Answered by: Werner Customer Care
Date published: 2015-05-13

Which model MasterLock

Which MasterLock fits this model?
Asked by: Charles
This is designed to be used with a Masterlock No. 1, Masterlock No.5, or American Lock No.50 padlock
Answered by: Werner Customer Care
Date published: 2017-07-09

Where is it made?

What country is it manufactured?
Asked by: gogospeed
Answered by: Werner Customer Care
Date published: 2017-07-08

Lid Gas Strut

Does the model 42 come with a gas strut? The photo shows one but when I look this same model up on Home Depot website as well as other websites, it shows a manually operated lid holder.
Asked by: rlambert94
The model 42 does come with a gas strut.
Answered by: Werner Customer Care
Date published: 2017-04-09

Can I order a box in white.

I plan to mount it in the bed of my Ford Lariat. I'm not a contractor & want a nice looking safe storage box.
Asked by: Anonymous
Unfortunately we only manufacture this box is the Knaack trademark tan.
Answered by: Werner Customer Care
Date published: 2016-12-22

Chest Models Suitable for Exterior Storage of Flammable Materials

Are the chest type Jobmaster boxes (Model 4824 as an example) recommended for long term outdoor storage of petroleum products?
Asked by: Robbo
We do not suggest ever storing flammable materials in any of our boxes. These boxes are not fireproof.
Answered by: Werner Customer Care
Date published: 2015-07-08

watchmaster IV is what size Masterlock?

Asked by: Melnix
Please follow the below link for specific instructions https://s3.amazonaws.com/wernerco.content/WEB_PDF/Knaack/Boxes/14-0014_RevD.pdf
Answered by: Werner Customer Care
Date published: 2017-04-24
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