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AP Astro Pneumatic Tool Company

Astro Tools 78005 4pc 3/8" Drive Goliath High Torque-Saver Impact Extension Bar Set 2.5" -15"

  • Based on 194 reviews
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Availability: In Stock.
Fulfilled by Amazon
Arrives Thursday, Aug 20
Order within 10 hours and 59 minutes
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Size: 3/8" Drive - 4 Pieces


Features

  • The first impact extensions designed for modern high performance 3/8" impact wrenches
  • Goliath extensions deliver 15-25% more torque to the fastener than every other 3/8" extension that came before them
  • Larger shaft size takes up minimal additional space, around 2mm extra in each direction
  • Precision heat treated Cro-Mo, simple lifetime warranty process. Just email Astro an image of the damaged tool and have a replacement shipped!

Description

Maximize your impact wrench's power with the Astro Tools 78005 Goliath Impact Extension Bar Set. This 4-piece, 3/8" drive set, ranging from 2.5" to 15", is specifically engineered for high-torque applications. The Goliath extensions deliver an unprecedented 15-25% more torque than any previous 3/8” impact extension, ensuring you conquer the toughest fasteners.

Manufacturer: ‎Astro Tools


Part Number: ‎78005


Item Weight: ‎3.36 pounds


Package Dimensions: ‎16.65 x 3.94 x 1.02 inches


Item model number: ‎78005


Size: ‎3/8" Drive - 4 Pieces


Color: ‎Black


Material: ‎Chromium Molybdenum Steel


Power Source: ‎air_powered


Item Package Quantity: ‎1


Included Components: ‎3/8" Drive Goliath Torque-Saver Impact Extension Bar Set 2.5" -15"


Warranty Description: ‎Manufacturer Warranty


Date First Available: March 14, 2025


Frequently asked questions

If you place your order now, the estimated arrival date for this product is: Thursday, Aug 20

Yes, absolutely! You may return this product for a full refund within 30 days of receiving it.

To initiate a return, please visit our Returns Center.

View our full returns policy here.

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Leasing options through Acima may also be available during checkout.

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Similar Products

Top Amazon Reviews

    • Heavy duty quality pieces.
Size: 1/2" Drive - 4 Pieces
Very very good quality. These are the beefiest extensions I have. These are clearly meant for max torque. The male and fits it's snugly, but not too tight in sockets. Like this the energy will get transferred. I am very happy.
Reviewed in the United States on June 27, 2026 by Amazon Customer
    • Very much worth the money
Size: 3/8" Drive - 4 Pieces
I mean, they chonky so you know they’ll last forever use them with a dewalt dcf923 3/8 impact and it’s no slouch it hammers these things and the female side doesn’t show much wear after a couple of hard weeks of use good product so far can feel the difference from my old cheap extensions. It might save you from having to get in an awkward spot with a ratchet is all I’m saying… ... show more
Reviewed in the United States on February 21, 2026 by T
    • Quality product at an amazing price
Size: 1/2" Drive - 4 Pieces
These impact extensions are probably the best you can buy for 1/2 as they are crazy thick and sturdy. Not only are they well made and come with a plastic holding tray but they are very affordable.
Reviewed in the United States on April 9, 2026 by Jesus
    • Awesome product!!
Size: 1/2" Drive - 4 Pieces
They work great! Torque transfer is 100%
Reviewed in the United States on January 4, 2026 by t
    • Great build quality
Size: 3/8" Drive - 4 Pieces
These extensions are great quality. The fit is spot on, and they don’t wobble or feel loose like some cheaper sets I’ve used. The finish is clean and durable, and they’ve held up well under regular use without showing wear. They give a solid, confident feel when breaking loose bolts, and the range of sizes covers most of what I need. For the price, the Astro 78005 set is a fantastic value and feels like it’ll last a long time. Highly recommend for any toolbox. ... show more
Reviewed in the United States on September 5, 2025 by GlobalTechNomad
    • Finally a great extension
Size: 3/8" Drive - 4 Pieces
Absolutely amazing. We all know you lose torque with extensions. These beasts seriously reduce the loss. Use the everyday.
Reviewed in the United States on December 15, 2025 by JOHNNY W. JONES
    • They make a difference
Size: 3/8" Drive - 4 Pieces
These are absolutely worth the money. Torque output with these compared to normal impact extensions is way better.
Reviewed in the United States on June 12, 2026 by Dylan
    • Heavy duty
Size: 1/2" Drive - 4 Pieces
Hogh quality extensions
Reviewed in the United States on March 16, 2026 by Stanley Wilson

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