Shredder has two solid rotors with knives holders
Easy changeable knives are mounted on the knives holders by 2 screws each. Both sides of knives holder are covered by covers from tool steel.
The main advantage of this shredder is, that knives are easy changeable without dismounting the shredder and the price for spare parts (operating costs) is much lower than in common shredders. Knives have two edges and after edge is blunt, only turning is needed.