Grindstone

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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. Grindstone dimensions: 22"(W) x 6"(H) x 2 3/4"(D) 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 Show more