Blades Balancer: This product can quickly test mower cutter balance. Balance: It is easy to see which end of the cutter is light and which end is heavy with the balancer. Simple to use: The cutter balancer has a simple structure and good practicability. Multi-aperture: Tests of different diameter steps on the cutter holder can be selected according to the cutter of different apertures. Widely applicable: Suitable for outdoor, family, garden grass maintenance use.