The Grindstone is a precision-engineered edge training platform designed to meet the demands of climbers across the performance spectrum.

It features a comprehensive progression of edge depths paired with Tension's signature edge radius profile that maximizes comfort while training.

Ideal for structured finger strength protocols, the Grindstone has become a foundational tool for serious climbers worldwide.

Key Features:

  • Full Width "Bar-style" Top Jug
  • 50mm center one-arm edge
  • 30mm edges
  • 25mm edges
  • 20mm edges
  • 15mm edges
  • 10mm edges
  • 8mm edges
  • Top phone slot for timer

Customers also bought

    • FREE SHIPPING IN USA

      Enjoy free shipping with

      every order on our website.

    • SATISFACTION GUARANTEED

      If your order arrives defected or

      fails to function properly, you will

      receive a full 100% refund!

    • PREMIUM CUSTOMER SUPPORT

      Connect with us through email

      or phone, and we will address

      any questions you may have!

    • SECURE ENCRYPTED PAYMENTS

      We utilize advanced encryption to

      ensure there is never an issue with

      your privacy.