A BESS-certified sharpness tester from Edge On Up. Instead of guessing, the PT50 quantifies edge sharpness as a numeric BESS score — the shared scale used by professional sharpeners and enthusiasts worldwide to compare and track edges.

• Type: edge sharpness tester (BESS certified)
• Variants: PT50A, PT50B, PT50C
• Includes: KF10R knife fulcrum with silicon-rubber edge rest
• Brand: Edge On Up