Where spreaders have consistently failed in the past, Cresco is offering the ability to spread every type of Fertilizer or Grass seed with precision. Products from .5mm up to 5mm can be used through this spreader. Fertilizers 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. Border control is achieved by pushing the border control slider across, you can shut off one side of the spreader. This helps save patio paths and flower borders from the spread of material where itâs not required.