In Focus: Assenmacher Specialty Tools 14mm Bypass Wrench, No. BY14

Nov. 13, 2023
Designed to access hard-to-reach Turbo bolts and nuts by maneuvering around obstructions.

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The Assenmacher Specialty Tools 14mm Bypass Wrench, No. BY14, is designed to assist in removing and replacing Turbo bolts and nuts on Volvo and Mack trucks as well as other applications requiring a 14mm wrench.

Selling points

  • Enables access to hard-to-reach places.
  • Provides added leverage to 3/8” tools.
  • For heavy duty shops that repair Volvo and Mack trucks.

Features and benefits

  • Used to access bolts and nuts by going around obstructions that are in the way and would normally need to be removed or cannot be removed otherwise.
  • Made from forged steel.
  • Has a 3/8” drive.
  • Also available in 10mm (No. BY10) and 13mm (No. BY13) sizes.


The company discovered how difficult it was to get to Turbo bolts after listening to heavy duty technicians and seeing it firsthand, so they decided to do something about it.

Manufacturing/engineering specifications

The wrenches are made from forged steel in their production facility in Taiwan.

Storage and display

The BY14 wrenches come sealed in individual bags. The company suggests displaying the tools next to other wrenches on the truck.

Suggested retail price

  • BY14 - $39.02 
  • BY13 – $39.02 
  • BY10 - $35.34

For more information

Contact [email protected].  

Information provided by Assenmacher Specialty Tools (AST). 

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