For an effective way of flattening the top of your lawn after sowing seeds and more, look to this garden roller from Outsunny. Made from steel for a strong piecewith a protective coating. You can fill the rolling drum up to 38L with water or sand; the maximum 62kg weight flattens grass to how you want it. A long 'U' shaped handle allows you to push/pull it easily. OUTSUNNY Combination Push/Tow Lawn Roller Filled w/ 38L Sand or Water Roller in Black