Cannon PowerWorks

Rating+Filing Service

Add this service to your cart, then update the quantity to match the number of grippers to be rated and filed.  

Rating service includes the following from Cannon PowerWorks:
  • Oiling and cleaning the spring
  • 30+ full closes
  • Anodized aluminum ID tag with lacquer-filled stamps
  • Learn more

Why is filing beneficial?

  • Train beyond the normal range
  • Builds devastating closing power
  • Works as a "plateau buster"
Please note that the Filing Service permanently alters the gripper.  Our custom filing process leaves a beautiful mirror finish on the cut surface of the gripper handle.

If not all the grippers on your order will be rated and filed then you can specify which gripper to rate and file in the notes at checkout. You can also specify which color tag goes with each gripper if multiple colors were ordered. Email if you have questions.


Grippers in a sealed package (IronMind, GHP) must be opened for the rating and filing service.  You will still receive the packaging with your gripper.  


Ratings and filings are typically done on weekends. This service may delay shipment of your order.

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