What is the primary purpose of using an extension with a torque wrench?

• A. To reach fasteners in tight spaces
• B. To increase applied torque beyond the wrench setting
• C. To calibrate the torque wrench
• D. To measure bolt length

Answer: (A)

The main idea is access: an extension lets you reach fasteners that are tucked away behind other parts or inside tight cavities, so you can apply the specified torque without forcing the tool or disassembling surrounding components. It’s helpful because engines and assemblies often place bolts in recessed or crowded areas, and the extension provides the needed reach while keeping the torque wrench aligned for proper operation. Keep in mind that changing the lever length can affect the actual torque delivered, especially if the extension isn’t kept at a right angle to the drive; in those cases you may need a correction factor or a different setup to ensure the target torque is achieved. This tool isn’t for calibrating the wrench, measuring bolt length, or increasing torque beyond what you’ve set.