The interchangeable sector Hardox knives, double blade, can be adapted to any plant and installation both for green and dry orchard wood. Shear cutting brings about considerable benefits: does not cause abrasion, does not damage the cut branch, does not produce any sawdust and it simulates hand cutting. Works at low revolutions per minute and allows a considerable saving of fuel. It allows the operator to carry out various cutting operations in complete safety, without damaging.