OLT Sava disc harrows (20, 24 and 28 discs) are classic disc harrows used for preparing the soil after plowing before sowing. The differences between the models are in the width of the grip: 20 discs are about 1.8 m, 24 discs are about 2.1 m, and 28 discs are about 2.4 m. The diameter of the discs is usually about 460 mm, and the processing depth is about 8-12 cm.