Knaack Model 91 Storage Master Piano Box With Ramp, 57.5 CU FT

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  • Regular price $1,610.92

The Model 91 STORAGEMASTER® Piano Box provides a complete storage solution for tools, supplies, and other materials. This gang box features a built-in 48in-wide, 12-gauge steel ramp to make loading large, bulky items easy. Measuring 72in wide and 78in high when open (49in when closed), this job box offers 57.5 cu ft of storage for all trades. Full-width interior shelves enable you to organize and protect tools, and the bi-fold cover opens upwards and folds completely out of the way for unrestricted access. A tan, powder-coat finish provides durable protection against corrosion, while a heavy-duty piano hinge protects against pry-ins and theft. A Watchman® IV Lock System aids further in this protection, featuring recessed, 7-gauge lock housing and a 3-point latch system. Handles are also recessed to avoid damage during transit. Run power to the interior of the box with a grommeted, weatherproof Power Pass® Electrical Pass-Thru. Spring guards prevent damage from shifting loads during transport. You can access this jobsite storage box from any side thanks to 7-gauge, 4-way skids.


  • Integrated 48in-wide, heavy-duty loading ramp makes storage of heavy equipment in jobsite box easy
  • Piano box features patented WATCHMAN® IV Lock System with 3-point latch and 7-gauge reinforced lock housing for best-in-class theft prevention
  • Heavy-duty 16-gauge steel construction with fully arc-welded seams
  • Spring guards prevent shifting loads in piano box from damaging gas springs
  • Piano box lids are supported by dual gas-springs that assist in the operation of the lid
  • 4-way skids with 7-gauge construction allow access to tool storage box from any side, making it easier, faster, and safer to transport
  • Pre-punched skids allow easy installation of casters (available as optional accessories)
  • Heavy-duty recessed side handles allow for enhanced mobility of jobsite box and protection against damage in transport
  • Heavy-duty piano hinge offers best-in-class protection against break-ins
  • Steel storage box features powder-coat finish for superior durability and corrosion resistance
  • Power Pass® Electrical Pass-Thru grommet provides easy, weatherproof power cord access to piano box