Stop wasting money on new blades! The TrueSharp Power Sharpener sharpens your rotary blades with the push of a button! Make quick work of sharpening 28mm, 45mm, and 60mm rotary blades with the TrueSharp's high–quality sharpening stones. Sharpens any brand 28mm, 45mm, or 60mm rotary blade. Long-lasting, high-quality sharpening stones. Non-slip bottom surface. No batteries required, plugs into wall outlet. The new larger 60mm blade and it now comes with diamond stones.