Astro Tools 78004 4pc 1/2-Inch Drive Goliath High Torque-Saver Extension Bar Set (2.5–15 inches)

Meet the Astro Tools 78004 Goliath High Torque-Saver Extension Bar Set

Upgrade your impact wrench capabilities with this four-piece, 1/2-inch drive extension set that spans from 2.5 inches up to 15 inches. While results depend on your tools and application, these extensions are designed to deliver more leverage and reach when breaking stubborn fasteners in tight spaces.

Key benefits

• The first impact extensions designed for high-torque impact wrenches.
• Goliath extensions deliver 15–25% more torque to the fastener than earlier 1/2-inch extensions.
• Larger shaft size takes up minimal extra space—about 2 mm more in each direction.
• Precision heat-treated Cro-Mo steel with a simple lifetime warranty process.

Durability and design

Crafted for demanding work, these extensions combine high-strength Cro-Mo steel with heat treatment to resist impact and flex. The compact shaft design helps you access fasteners behind brake components, within engine bays, or in wheel wells without sacrificing strength.

Real-world use cases

• Automotive maintenance: reach deep fasteners in brakes or suspension with steady leverage.
• Industrial environments: position the fastener for optimal grip while maintaining clearance and control.
• Routine repairs: switch between lengths to maintain leverage without over-torquing delicate hardware.

How to use

• Attach to a 1/2-inch drive impact wrench and select the extension length you need.
• Ensure proper seating at the fastener, then apply steady, controlled torque.

Warranty and service

Astro offers a simple lifetime warranty on these extensions. If you encounter damage, email an image of the tool for replacement instructions.