1. Knurling wheels: Approximately 0.5 mm, 1.0 mm, 2.0 mm 2. Diameter of knurling wheels: 20 mm (Approximately 0.79 inches) 3. 0.5 mm diagonal straight knurling wheel: - Knurling pitch: 0.5 mm - Net pulley diameter: Approximately 26 mm (Approximately 1.02 inches) - Approximately 10 mm (Approximately 0.39 inches) - Thickness of knurling wheel: 0.8 mm (Approximately 0.31 inches) 4. 1 mm diagonal straight knurling wheel: - Knurling pitch: 1.0 mm - Outer diameter of knurling wheel: Approximately 26 mm (Approximately 1.02 inches) - Approximately 10 mm (Approximately 0.39 inches) - Thickness of knurling wheel: Approximately 8 mm (Approximately 0.31 inches) 5. 2 mm diagonal straight knurling wheel: - Knurling pitch: 2.0 mm - Outer diameter of knurling wheel: Approximately 26 mm (Approximately 1.02 inches) - Approximately 10 mm (Approximately 0.39 inches) - Thickness of knurling wheel: Approximately 8 mm (Approximately 0.31 inches) 6. Dimensions: 25×8 mm (Approximately 0.31×0.98 inches, Outer diameter × Thickness) 7. Color: Black 8. Material: Steel 9. Package contents: - 1 knurling tool - 6 knurling wheels 10. Only the above - mentioned package contents are included, and other items are not included. 11. Note: Light and different displays may cause the color of the item to vary slightly from the actual product. The allowable measurement error is approximately ±1 - 3 cm.