A studio product view of the Klein Tools 55665 Ironworker and Welder Backpack with the front compartment open. The image highlights the specialized removable front pocket designed to hold a welding helmet and hard hat, constructed from black and orange flame-resistant ballistic weave.
A technical infographic detail of the tradesman backpack. Callouts emphasize the aircraft cable reinforced handle for heavy lifting, the 20 high-visibility orange interior pockets for tool organization, heavy-duty zippers with lockable pulls, and the adjustable welding helmet pocket.
A lifestyle shot showing the backpack in a metal fabrication shop. The text overlay confirms the exterior 1680d ballistic weave and leatherette materials meet NFPA701 performance requirements for fire resistance, essential for ironworkers and welders.
An action lifestyle shot of the Klein Tools tool bag on a construction site. The image demonstrates the backpack carrying a hard hat on top and a spud wrench on the side, highlighting the tough molded bottom that protects gear from dirt and debris on the ground.
A composite marketing graphic showing specialized storage for ironworker tools. Labeled sections show dedicated space for a 36-inch connecting bar, custom internal straps for an 18-inch spud wrench, a pocket for a large hammer, and a protective hard pocket for welding lenses.
A split-screen marketing image demonstrating dual storage capability. The top half shows the front pocket holding a welding helmet harness, while the bottom half shows a hard hat secured to the exterior, proving the backpack can carry both essential safety items at the same time.
An overhead view looking into the fully unzipped main compartment of the tool backpack. The high-visibility orange interior features multiple tiered pockets for organized storage of hand tools, ensuring everything is easily accessible in low-light environments.
A left-side profile view of the Klein Tools 55665 backpack partially unzipped. This angle showcases the depth of the main compartment, the padded ergonomic shoulder straps, and a side zipper pocket for storing smaller gear or personal items.
A right-side profile view of the ironworker backpack. The image highlights the exterior water bottle pocket, additional tool loops, and the heavy-duty construction of the ballistic weave material designed for professional jobsite durability.
A studio back view of the Klein Tools Tradesman Pro backpack. The image highlights the heavily padded ergonomic shoulder straps and the breathable mesh back panel designed for comfort when carrying heavy ironworker tools and equipment.
A studio back view of the Klein Tools Tradesman Pro backpack. The image highlights the heavily padded ergonomic shoulder straps and the breathable mesh back panel designed for comfort when carrying heavy ironworker tools and equipment.
A top studio view of the Ironworker and Welder backpack. This angle showcases the heavy-duty aircraft cable reinforced handle and the hard-shell top compartment designed to protect sensitive electronics and safety glasses from crushing or impact.
An action lifestyle shot showing a professional ironworker wearing the 55665 backpack on a construction site. The bag is shown carrying a large 36-inch connecting bar and a hard hat, demonstrating its specialized storage capacity for structural steel workers.
A lifestyle shot of the Klein Tools backpack resting in the bed of a pickup truck alongside a tool belt. The image shows the backpack's removable front pocket holding a welding helmet, highlighting the bag’s versatility for transporting trade-specific gear.
A close-up view of a technician reaching into the main compartment of the tradesman backpack. The high-visibility orange interior is shown fully organized with various hand tools, including wrenches and levels, emphasizing the 27 tiered pockets for superior tool accessibility.
Tradesman Pro™ Ironworker and Welder Backpack (55665) promotional how to video
A studio product view of the Klein Tools 55665 Ironworker and Welder Backpack with the front compartment open. The image highlights the specialized removable front pocket designed to hold a welding helmet and hard hat, constructed from black and orange flame-resistant ballistic weave.
A technical infographic detail of the tradesman backpack. Callouts emphasize the aircraft cable reinforced handle for heavy lifting, the 20 high-visibility orange interior pockets for tool organization, heavy-duty zippers with lockable pulls, and the adjustable welding helmet pocket.
A lifestyle shot showing the backpack in a metal fabrication shop. The text overlay confirms the exterior 1680d ballistic weave and leatherette materials meet NFPA701 performance requirements for fire resistance, essential for ironworkers and welders.
An action lifestyle shot of the Klein Tools tool bag on a construction site. The image demonstrates the backpack carrying a hard hat on top and a spud wrench on the side, highlighting the tough molded bottom that protects gear from dirt and debris on the ground.
A composite marketing graphic showing specialized storage for ironworker tools. Labeled sections show dedicated space for a 36-inch connecting bar, custom internal straps for an 18-inch spud wrench, a pocket for a large hammer, and a protective hard pocket for welding lenses.
A split-screen marketing image demonstrating dual storage capability. The top half shows the front pocket holding a welding helmet harness, while the bottom half shows a hard hat secured to the exterior, proving the backpack can carry both essential safety items at the same time.
An overhead view looking into the fully unzipped main compartment of the tool backpack. The high-visibility orange interior features multiple tiered pockets for organized storage of hand tools, ensuring everything is easily accessible in low-light environments.
A left-side profile view of the Klein Tools 55665 backpack partially unzipped. This angle showcases the depth of the main compartment, the padded ergonomic shoulder straps, and a side zipper pocket for storing smaller gear or personal items.
A right-side profile view of the ironworker backpack. The image highlights the exterior water bottle pocket, additional tool loops, and the heavy-duty construction of the ballistic weave material designed for professional jobsite durability.
A studio back view of the Klein Tools Tradesman Pro backpack. The image highlights the heavily padded ergonomic shoulder straps and the breathable mesh back panel designed for comfort when carrying heavy ironworker tools and equipment.
A studio back view of the Klein Tools Tradesman Pro backpack. The image highlights the heavily padded ergonomic shoulder straps and the breathable mesh back panel designed for comfort when carrying heavy ironworker tools and equipment.
A top studio view of the Ironworker and Welder backpack. This angle showcases the heavy-duty aircraft cable reinforced handle and the hard-shell top compartment designed to protect sensitive electronics and safety glasses from crushing or impact.
An action lifestyle shot showing a professional ironworker wearing the 55665 backpack on a construction site. The bag is shown carrying a large 36-inch connecting bar and a hard hat, demonstrating its specialized storage capacity for structural steel workers.
A lifestyle shot of the Klein Tools backpack resting in the bed of a pickup truck alongside a tool belt. The image shows the backpack's removable front pocket holding a welding helmet, highlighting the bag’s versatility for transporting trade-specific gear.
A close-up view of a technician reaching into the main compartment of the tradesman backpack. The high-visibility orange interior is shown fully organized with various hand tools, including wrenches and levels, emphasizing the 27 tiered pockets for superior tool accessibility.
Tradesman Pro™ Ironworker and Welder Backpack (55665) promotional how to video
KLEIN TOOLS

Klein Tools 55665 Tradesman Pro Ironworker and Welder Backpack Flame Resistant 27 Pockets Fits 36 Inch Connecting Bar Welding Helmet and Hard Hat Bag

In stock
SKU: 55665
$209.99

Description

Klein promotional logo logout

The Ultimate Jobsite Mobile Station: Klein Tools Tradesman Pro™ Flame-Resistant Backpack for Ironworkers and Welders

Engineered specifically for the high-intensity demands of the structural steel and fabrication industries, the Klein Tools 55665 Tradesman Pro™ Ironworker and Welder Backpack is more than just a tool bag—it is a customized mobile workstation. Constructed with NFPA701 compliant 1680d ballistic weave and rugged leatherette, this backpack is built to withstand sparks, slag, and the brutal conditions of the jobsite. With a massive 50-pound load capacity and a fully molded waterproof bottom, your expensive precision tools stay protected from sharp edges, mud, and the elements, whether you are on a skyscraper deck or a shop floor.

Organization meets innovation with 27 specialized pockets designed for unique trade tools. This backpack solves the industry’s biggest transport challenges by providing dedicated space for a 24-inch to 36-inch connecting bar, custom interior straps for spud wrenches, and a reinforced pocket for a 6 lb hammer. The revolutionary front compartment is adjustable to secure both a welding helmet and a hard hat simultaneously, and it is completely removable for easy cleaning of grit and soot. Heavy-duty aircraft cable reinforces the handle, ensuring that even under max capacity, this bag provides the reliable, long-term performance that elite tradespeople expect from Klein Tools.

Key Features

  • Flame-Resistant Construction: 1680d ballistic weave exterior meets NFPA701 standards for superior durability near heat and sparks.
  • Dual Helmet Storage: Unique adjustable front pocket carries a welding helmet and hard hat at the same time.
  • Large Tool Compatibility: Specifically designed to house 24-inch to 36-inch connecting bars and 18-inch spud wrenches.
  • Hard-Shell Protection: Integrated hard front pocket keeps expensive welding lenses, safety glasses, and electronics safe from impact.
  • Maximum Reinforcement: Features an aircraft cable reinforced handle and a molded polypropylene bottom to support heavy loads up to 50 lbs.
  • Ergonomic Comfort: Extra-padded shoulder straps with load adjusters distribute weight evenly to reduce strain during transport.
  • Jobsite Ready: Lockable heavy-duty zippers and a wide-open interior for easy access to large gear.

What's Included

  • (1) Klein Tools 55665 Tradesman Pro™ Ironworker and Welder Backpack
  • (1) Removable Adjustable Front Welding Helmet Pocket

Specifications

Brand Klein Tools
Model Number 55665
Total Pockets 27
Interior Pockets 20
Exterior Pockets 7
Weight Capacity 50 lbs
Overall Height 24.5 Inches
Overall Length 17.5 Inches
Overall Width 16.0 Inches
Material 1680d Ballistic Weave
Bottom Type Hard Molded Polypropylene
Product Weight 11.2 lbs

Pro-Tip: To extend the life of your backpack, take advantage of the removable front pocket. After a heavy week of welding, remove the pocket and shake out the metallic dust and slag before it works its way into the zippers. Keeping the zipper tracks clear of debris will ensure the aircraft cable handle and lockable pulls stay functional for years.