3 gab. pakāpienveida, soļu garums :a)4-12: 4, 5, 6, 7, 8, 9, 10, 11, 12.;b)4-20: 4, 6, 8, 10, 12, 14, 16, 18, 20.;c)4-30: 4, 6, 8, 10, 12, 14, 16, 18, 20, 22, 24, 26, 28, 30. 3 gab. urbji: 3, 6, 8 mm.