The MK Martin Field Roller, engineered to effectively pack and level your field surface, protecting your equipment from large rocks, and achieving optimal seed-to-soil contact. MK martin builds for strength and performance. Unlike many field rollers, the MK Field roller is built with an impressive half-inch thick rolled steel to form the drum. This additional thickness protects the drum from damage while rolling over larger rocks as well and ensuring superior weight per square foot for effective field preparation. Additionally, the MK field roller is built with a 3” diameter drum roller shaft. The 2 inch diameter u-joint and pivot pins come with composite bushing to ensure a low maintenance operation.