United States [Change]Global Reach
Products > Jobsite-Storage-Equipment > Jobsite Storage > Piano Series > Model 89 STORAGEMASTER® Piano Box, 47.8 cu ft > 89

89 Jobsite Storage - Knaack US
89 Jobsite Storage - Knaack US89 Jobsite Storage - Knaack US89 Jobsite Storage - Knaack US
YouTube Video Jx1vWFeLGtc


  •  View Piano Series Page
  •  Replacement Parts
  • Share
  •  Email page | Print this page


Complementary Products

You May Also Consider

Model 89 STORAGEMASTER® Piano Box, 47.8 cu ft


Approx. Cu. Ft. Per UnitApprox. Shipping Weight (lb)

The Model 89 STORAGEMASTER® Piano Box measures 60 in wide, 78 in tall and has a capacity of 47.8 cu ft. Ideal for mechanical trades, it is caster-ready and includes full-width shelves for organization of tools and supplies. It also features a bi-fold cover which folds completely out of the way for unrestricted access.


  • WATCHMAN® IV Lock System with recessed lock housing for protection against theft
  • Additional reinforcement between the lock and the side housing
  • Power Pass® electrical pass-through grommet provides easy, weatherproof power cord access
  • Heavy-duty hinges are extra durable and resist pry-ins
  • 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 49 in
  • Open height 78 in
  • Caster-ready 14-gauge steel skids to accommodate optional casters
  • Recessed handles for positive gripping even with gloves on
  • Gas spring guards to prevent damage from shifting loads
  • Improved ball stud bracket provides added strength reduces the potential for breakage and improves durability
  • The workhorses on any jobsite, STORAGEMASTER® is ideal for every trade — mechanical, plumbing, HVAC, electrical, rough and finish carpentry


FeatureSize / Details
StylePiano Boxes
Steel Gauge16
Approx. Cu. Ft. Per Unit47.8
Approx. Product Height49in
Approx. Product Length60in
Approx. Product Width30in
Approx. Shipping Weight (lb)340
WarrantyLimited Lifetime
Closed Height49in
Electrical AccessPower Pass® Electrical Pass-Thru
Lock SystemWATCHMAN® IV Lock System
Max. Open Extended Height78in
Powder Coat FinishYes

Package Contents

Part NumberQtyDescription



Additional Piano Series Models

Model No.BrandApprox. Cu. Ft. Per UnitApprox. Product HeightApprox. Product LengthApprox. Shipping Weight (lb)Closed HeightBuy Online
1000MONSTER BOX®4854.5in66in40554.5in
When cover is closed, chest can be used as a work table.
79-DSTORAGEMASTER®; Junk Trunk™36.249in48in40049in
79-DHSTORAGEMASTER®; Junk Trunk™;ThermoSteel™38.249in48in42049in
89-DSTORAGEMASTER®; Junk Trunk™43.849in60in51049in
89-DHSTORAGEMASTER®; Junk Trunk™;ThermoSteel™47.849in60in53049in

Rated 1 out of 5 by from Very disappointed with four way skid design. We have been very disappointed with the new four way skid design. I have bought multiple knack boxes with casters bolted to the four way skids. On all of the boxes we have bought with the new four way skid design have failed structurally. This was caused by just pushing loaded box through job site by hand. See photo's P.S. I still have multiple older boxes with (boxed in skids) and have never had this problem.
Date published: 2018-08-23
Rated 2 out of 5 by from Does anybody look at these as they leave the facto Just took delivery of a brand new 89 and upon opening the box was completley empty inside. No manual, no padlock hardware, nothing. How am I supposed to safe guard thousands of dollars worth of tools with no padlock hardware? Am I supposed to spend a weekend trying to rig up something in my garage that works? Based on the pictures I've seen of the bent wheel mounts combined with this issue, I'm wondering if I should have purchased another Jobox! No issues with it and its an absolute beast.
Date published: 2018-10-02
Rated 2 out of 5 by from couls be a little stronger I just got it a week ago just put it on the job today after my wheels came in and there is damage to it I’m not happy about in I spent 2 k on the box
Date published: 2018-09-17
Rated 3 out of 5 by from Great Features. But weak on the wheel mounts. I recently bought this box, like a lot of features on it. But the wheel mounts are WEAK and bend easily. Very unhappy about that.
Date published: 2018-09-27
Rated 5 out of 5 by from Great box We bought this box to use as our mobile welding support box, there is plenty of space for all of the possible extra parts, and consumables in the top part. The drawers are a great way to store extra extension cords. The main part of the box was one of the reasons we went with this box, there is plenty of room for 20+ rolls of wire and whatever else you may need to pack along with you, the best part is that because of the drawers in the bottom it raises the bottom of the main portion up to a level that you can easily reach whatever you put inside without straining your back!
Date published: 2018-09-17
Rated 5 out of 5 by from Quality product Have had this box for 5 years now. You can store tons of tools and materials in these. I bought it damaged from a shipping company. No complaints
Date published: 2018-09-19
  • y_2019, m_2, d_16, h_23
  • bvseo_bulk, prod_bvrr, vn_bulk_2.0.11
  • cp_1, bvpage1
  • co_hasreviews, tv_0, tr_6
  • loc_en_US, sid_89, prod, sort_[SortEntry(order=RELEVANCE, direction=DESCENDING)]
  • clientName_knaack
  • bvseo_sdk, net_sdk,
  • CLOUD, getReviews, 2ms

Is the bottom junk drawer sealed from water getting into it some way?

Asked by: Roadwhore
The drawer is moisture resistant.
Answered by: Customer Care
Date published: 2018-11-16

What is the inside measurement of the model 90 box. I am wanting to 72" poles in the bottom of this box.

Asked by: jason
Please contact Customer Care at 888-523-3371 and we can email them to you.
Answered by: Customer Care
Date published: 2018-11-16

How do you lock it?

Asked by: TRAVIS
Model 89 installation and lock instructions are as follow: https://s3.amazonaws.com/wernerco.content/WEB_PDF/Knaack/Boxes/14-0008_RevF.pdf
Answered by: Customer Care
Date published: 2018-09-20

What is the max capacity weight these chests may carry or hold?

Asked by: Bernard
There is no published duty rating. If you add casters, it will be the duty rating of the casters. Please see the different casters we offer and their duty rating: https://www.knaack.com/en/products/truck-tool-boxes-equipment/knaack-accessories?ipp=24&cp=1&sort=default&tts=1534360032351
Answered by: Customer Care
Date published: 2018-08-15


Asked by: BO S
The ramp is 44" wide. The ramp extends 21" long, (from box to floor).
Answered by: KFIT
Date published: 2018-08-01

Are any Knaack job box's rated for NFPA storage limits? I have the work station model and the 2048 chest model with a few flammable aerosol cans inside, and am wondering if the job boxes are rated for flammable contents or if there is any literature.

Asked by: JamesK63
Flammables cannot be stored or used in our Knaack boxes.
Answered by: Customer Care
Date published: 2018-07-26

Hi, Can you please provide some info on how the bifold roof lifts up and down and what prevents it from falling onto a persons fingers. We are purchasing one of these for our site and need to ensure it wont cause injury.

Asked by: DavidHover
Please contact Customer Care at 888-523-3371 Monday through Friday from 8:00 AM to 5:00 PM EST.
Answered by: Customer Care
Date published: 2018-07-25

I have the storage master 79. The lift cartridge is bad, can I geet a replacement?

Asked by: aplmr
Knaack does not currently sell direct. Please contact your nearest distributor regarding the parts/items you are interested in purchasing. To locate the dealer nearest you, please visit the following link: http://www.knaack.com/en/where-to-buy
Answered by: Customer Care
Date published: 2018-07-19
  • y_2019, m_2, d_16, h_23CST
  • bvseo_bulk, prod_bvqa, vn_bulk_2.0.11
  • cp_1, bvpage1
  • co_hasquestionsanswers, tq_9
  • loc_en_US, sid_89, prod, sort_[SortEntry(order=LAST_APPROVED_ANSWER_SUBMISSION_TIME, direction=DESCENDING)]
  • clientName_knaack
  • bvseo_sdk, net_sdk,
  • CLOUD, getContent, 59ms