For sharp blades worldwide

Standard & Professional Sharpener instructions

Stumpfe Klingen schärfen - mit dem Duplex Sharpener erhalten Sie ein perfektes Schleif- und Schärfergebnis.


  • easy to use
  • no pressure necessary
  • forms no burr on the blade
  • cutting edges reamin sharper for longer
  • can be used by both right and left handed people



  1. Pull the concave sharpening edge gently along the blade several times without much pression
  2. Follow the given angle of the blade
  3. Work only with one side of the sharpener and always from the handle to the point of the blade. When sharpening Scissors, Secateurs and Pruning shears only sharpen the bevelled side.







Application Videos


ISTOR Video sharpening and grinding