Find your planter row-unit true seed depth by calibrating each row with Set-N-Seed. The first step to ensuring an even stand from your planter is to calibrate every row to the same depth. Whether new or used, planting depths will vary across a planter due to machining tolerances or wear-and-tear such that when all rows are to the same depth adjustment on the handle. Set-N-Seed is a tool to help you pre-determine the depth of each row so when setting the planter in the field all rows will have the same starting point. By setting each row to a pre-determined depth from 1" all the way to 2.5" in 1½" increments and then marking the depth handle you can be assured that when making depth adjustments all rows will have the same starting point to get the proper seed depth. This heavy-duty product is all American Made and will last for years. Use Set-N-Seed annually to ensure your planter is always planting at the same depth across all rows.