Manual lawn mowers have spiral blades that move as the mower is pushed forward. As these spiral blades rotate they move against a stationary blade located towards the rear of the mower. The grass is therefore sliced as it passes through both blades. The spiral blades move when the mower is pushed forward. This means therefore that the mower doesn't cut when not in motion.
16" @ 12500/-
18" @ 14500/-
20" @ 16500/-