Where spreaders have consistently failed in the past is offering the ability to spread every type of Fertiliser or Grass seed with precision. Products from .5mm up to 5mm can be used through this spreader. Fertilisers come in all shapes, sizes, and weights. As a result, they fly off the impellor in different ways. This can cause more material to be spread to the right than to the left, or vice versa. To even the amount of material spread on both sides, adjustments must be made to the application holes on the bottom. Our slider allows easy adjustment of the output holes.