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Mayhew Tools 37315 Pneumatic Bolt Breaker, 3/8-Inch

4.7 4.7 out of 5 stars 701 ratings

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Brand Mayhew Tools
Color Multi
Item Weight 0.33 Pounds
Head Style Fixed Square
Style German

About this item

  • Attaches to air hammer to provide vibration while removing stubborn/frozen fasteners or torx bolts/nuts
  • Standard .401 turn type Parker shank for air guns
  • Square drive for use with impact sockets
  • Black oxide finish for additional rust prevention
  • Made in the USA
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$16.07
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From the brand


From the manufacturer

air tools, power impact tools, air hammer, brake caliper tool, small hammer, impact gun, impact air
air tools, power impact tools, air hammer, brake caliper tool, small hammer, impact gun, impact air

Mayhew Tools Pneumatic Bolt Breakers

POWERED BY MAYHEW

Mayhew Tools Pneumatic Bolt Breakers attach to an air hammer to provide vibration while removing stubborn/frozen fasteners or torx bolts/nuts.

The end of each bolt breaker has either a 1/2 or 3/8-inch square drive to be used with impact sockets. The built-in hex (19mm - 3/4-inch) on the shaft of the tool is used in conjunction with an open-end wrench when loosening a stubborn fastener. Applications include bearing removal and GM caliper removal.

Features:

  • Designed for use with pneumatic air hammers
  • Black oxide finish for additional rust protection
  • Square drive for use with impact sockets
  • .401 Parker shanks
  • Made in the USA
air tools, power impact tools, air hammer, brake caliper tool, small hammer, impact gun, impact air
air tools, power impact tools, air hammer, brake caliper tool, small hammer, impact gun, impact air

Professional Grade. American Made.

Mayhew's tools are made for the tight tolerances, constant use, and unique applications specific to your line of work. Mayhew's tools stand up to the daily punishment of a busy shop, making them the professionals’ first choice for professional-grade equipment.

Founded in 1856, Mayhew Steel Products (Mayhew Tools) is the oldest punch and chisel manufacturer in the United States. As we’ve grown, there’s only one thing that hasn’t changed—our dedication to quality, reliability, and craftsmanship. That’s why we’ve become the tool of choice for technicians and professional mechanics across the country, and have found a home in the belts of do-it-yourselfers as well. Over time our product line has grown but our passion for manufacturing quality hand tools continues as we serve the Industrial, Automotive and Hardware industries.

Mayhew Tools is ISO 9001:2015 Certified. CIC Management, LLC. Certificate No. 17-1027. Issue Date: August 30, 2017.

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Warranty & Support

Amazon.com Return Policy:Amazon.com Voluntary 30-Day Return Guarantee: You can return many items you have purchased within 30 days following delivery of the item to you. Our Voluntary 30-Day Return Guarantee does not affect your legal right of withdrawal in any way. You can find out more about the exceptions and conditions here.
Manufacturer’s warranty can be requested from customer service. Click here to make a request to customer service.

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Mayhew Tools 37315 Pneumatic Bolt Breaker, 3/8-Inch


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Product Description

The Mayhew Tools 37315 Pneumatic Bolt Breaker, 3/8-Inch attaches to an air hammer to provide vibration while removing stubborn/frozen fasteners or torx bolts/nuts. The other end of the bolt breaker features a square drive to be used with impact sockets. Made in the USA. Overall length: 4.750-Inch, body size: 0. 401-Inch, weight: 0. 33-Lb. Mayhew stands for quality, dependability, and confidence. When the caliber of the tools is just as important as the skills of the professionals employed, businesses trust Mayhew to get the job done. Since 1856, our punches, chisels, and pry bars have been the go-to tools for OEMs and professional mechanics throughout the country. And while our company has grown to meet the needs of the professional market, as well as those of the do-it-yourself automotive enthusiast, our focus has never changed - leveraging our strength to build your business.

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Mayhew Tools 37315 Pneumatic Bolt Breaker, 3/8-Inch
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Price-30% $16.07
List:$22.93
$23.65$13.43$16.71$11.99
Delivery
Get it as soon as Tuesday, Apr 2
Get it as soon as Tuesday, Apr 2
Get it as soon as Tuesday, Apr 2
Get it as soon as Tuesday, Apr 2
Customer Ratings
Value for money
4.5
4.7
4.5
Sold By
Amazon.com
Amazon.com
Amazon.com
Amazon.com
Kaya Depot
head style
Fixed Square
chisel
Flat
handle material
Alloy Steel
Metal
Alloy Steel
Polyvinyl Chloride (PVC)
style
German
German
German
German
German
weight
0.33 pounds
0.41 pounds
0.01 ounces
0.3 pounds
1.5 pounds

Customer reviews

4.7 out of 5 stars
4.7 out of 5
701 global ratings

Customers say

Customers like the quality, performance, and value of the hammer mallet. For example, they mention it's an excellent tool, it works well for removing stuck and rusted bolts, and it'll save you a lot of time and money. That said, some complain it lacks a detent ball to hold the socket on the tool.

AI-generated from the text of customer reviews

53 customers mention49 positive4 negative

Customers are satisfied with the quality of the hammer mallet. They mention that it works well for stuck exhaust bolts, seized screws, and shallow "female" fastener heads like Phillips, Torx, Allen. Some say that it's a very professional tool.

"...Also It works well with impact hex or torx bit sockets and I use a 5/16 impact socket with screwdriver bits to shock things loose...." Read more

"...The knocker held up without any problems, however my 40T torx did not, no fault of the knocker. Yes, I would recommend this to a friend...." Read more

"well made but it has no socket retention." Read more

"Works really well in stuck exhaust bolts!" Read more

11 customers mention11 positive0 negative

Customers are satisfied with the performance of the hammer mallet. They mention that it's amazing for removing stuck and rusted bolts, and does well to free up stuck bolts. The tool is simple yet incredibly effective, and is a great time saver.

"...This is a great time saver and Mayhew is a great company. Don't buy knock offs or you'll probably break them before your bolts break free...." Read more

"...Just grab a 19mm wrench and a 3/8” T30 socket, you’re good to go. Makes quick work, and you don’t risk stripping out the fragile screws." Read more

"...This is great for breaking loose rusted and corroded oxygen sensors...." Read more

"I recommend using a smaller air hammer on this but it does well to free up stuck bolts! I got this to use to remove broken bolts and it works great!" Read more

8 customers mention8 positive0 negative

Customers appreciate the value of the hammer mallet. They say it is worth the money, inexpensive, and worth its weight in gold. Some customers also say it saves them time and money.

"...Yes, I would recommend this to a friend. Good value for a 3/4" drive screw knocker." Read more

"...Saved me a lot of time and money." Read more

"...Hasn't let me down yet. Worth the money." Read more

"Great idea been going to build my own but the price was right. Worked on five seized caliper bleeders so far" Read more

3 customers mention3 positive0 negative

Customers find the hammer mallet great for taking off screws on rotors and removing bleeder screws painlessly. They also say it's great for seized brake bleeders.

"This tool is awesome for taking off the screws on rotors. And no twisted bits!!" Read more

"bleeder screws removed painlessly, 2008 GMC 2500HD..." Read more

"Great for seized brake bleeder screws..." Read more

3 customers mention0 positive3 negative

Customers dislike the lack of a detent ball on the hammer mallet. They say that it doesn't hold a socket on the tool and that there is no hog ring or spring ball.

"...My only complaint is that there is no hog ring or spring ball so the sockets just fall off of the tool." Read more

"...The one downside is that it does not hold a socket -- it's lacking the little ball detent found on most ratchets and extensions." Read more

"...the only complaint is I wish it had a detent ball to hold socket on tool." Read more

EXCELLENT!
5 Stars
EXCELLENT!
I have used several devices like this in commercial aviation for removing inspection plates, screws etc in commercial airliners. This tool is known as a "screw knockers", "old man" and other weird names. I could not find mine so I bought this one. I am not disappointed. I read that some users complained about this "old-man" not having a retaining ball and the socket, etc., would fall off. These tools are designed to take a LOT of abuse and a ball-spring-detent would just make it weaker, (I have never seen one with a ball detent). In aviation we always wrapped a small half strip piece of masking tape around the end (shown in photos), and Wala! The socket stays on. I hope this is helpful. By the way, the shank is 10.05 mm or .3975" . I used this in a .401" shank 4X rivet gun and pounded the stuffings out of it. It held up well. A rivet gun hits much slower but way harder then a air hammer. The knocker held up without any problems, however my 40T torx did not, no fault of the knocker. Yes, I would recommend this to a friend. Good value for a 3/4" drive screw knocker.
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Customer image
5.0 out of 5 stars EXCELLENT!
Reviewed in the United States on June 10, 2020
I have used several devices like this in commercial aviation for removing inspection plates, screws etc in commercial airliners. This tool is known as a "screw knockers", "old man" and other weird names. I could not find mine so I bought this one. I am not disappointed. I read that some users complained about this "old-man" not having a retaining ball and the socket, etc., would fall off. These tools are designed to take a LOT of abuse and a ball-spring-detent would just make it weaker, (I have never seen one with a ball detent). In aviation we always wrapped a small half strip piece of masking tape around the end (shown in photos), and Wala! The socket stays on. I hope this is helpful. By the way, the shank is 10.05 mm or .3975" . I used this in a .401" shank 4X rivet gun and pounded the stuffings out of it. It held up well. A rivet gun hits much slower but way harder then a air hammer. The knocker held up without any problems, however my 40T torx did not, no fault of the knocker. Yes, I would recommend this to a friend. Good value for a 3/4" drive screw knocker.
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8 people found this helpful
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Top reviews from other countries

Amazon Customer
5.0 out of 5 stars A must for duramax glow plugs
Reviewed in Canada on November 4, 2021
One person found this helpful
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Ben Smith
5.0 out of 5 stars great tool
Reviewed in Canada on January 7, 2021
2 people found this helpful
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Rob
5.0 out of 5 stars An absolute game changer for seized bolts
Reviewed in Australia on December 2, 2020
Jerry S
5.0 out of 5 stars A must have!
Reviewed in Canada on April 27, 2021
Big Jim
4.0 out of 5 stars works good
Reviewed in Canada on December 21, 2021
One person found this helpful
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