Specifications Color: Green Size: 18 inches/21 inches Material: Galvanized Steel, Metal, PP Product Size: 18" x 51"/21"x 51"(L x H) Drum Dimension: 5.5” Spike Length: 1.3” Sand Capacity: 5.5L/6.8L Net Weight: 9.5 lbs/11 lbs Key Features ● Create Healthy Lawn: The 18/21" roller comes with a total of 27/33 rustproof spikes, providing a wide coverage of lawn aeration. Besides, the combination of 3 longer and 3 short plates of spikes will improve the efficiency, thus allowing plants to take in water, air and nutrients for prosperous growth. ● Filling Design for Enhanced Aeration: To achieve deeper aeration and promote better root development, the lawn aerator features a drum that can be filled with 5.5/6.8L sand or stone. Therefore, the spikes penetrate deeper into the ground, allowing for more effective aeration. ● Ergonomic Handle for Easy Control: Thanks to the 51" long handle, there is no numbness in your legs and less soreness in your waist after a long time of lawn caring. Additionally, the manual push aerator features anti-slip and comfortable handle for easier control. ● Applicable to Various Scenes: Because the important role it plays in promoting the growth of grass, the spike lawn aerator can be widely applied to garden, yard, cropland. Furthermore, the rolling lawn aerator extends to different soil types, including dirt soil, sand soil and clay. ● Quick and Easy Assembly: With detailed instructions and all the necessary hardware provided, you can easily set up the heavy duty aerator in no time. And you can quickly connect the handles from bottom to top with tool-free spring summary.