Knaack Model 91 STORAGEMASTER® Piano Box with Ramp

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Made In USA
SKU: 91

Knaack Model 91 STORAGEMASTER® Piano Box with Ramp

The Model 91 STORAGEMASTER® Piano Box measures 72 in wide, 78 in tall and has a capacity of 57.5 cu ft. It features a built-in 12-gauge steel ramp to make loading large, bulky items easy. Ideal for every trade, it is caster-ready and includes full-width shelves for organization of jack hammers, tools and supplies. It also features a bi-fold cover which folds completely out of the way for unrestricted access.


  • Uses Accessory Door Shelf Model 491
  • 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 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


  • Approx. Cu. Ft. Per Unit: 57.5
  • Product Height: 49in
  • Product Length: 72in
  • Product Width: 30in
  • Shipping Weight: 409 lbs
  • Closed Height: 49in
  • Max. Open Extended Height 78in

Product Code: 91

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