The purpose of the Tiller Tine is to dig into soil for cultivation by driving a spike into the lawn and turning up soil. Tines are typically a set of four L-shaped blades to cut into dirt, turn it over, break up clumps, and tear out grass and weeds to refresh or prepare a lawn for seed or sod. Tree roots, rocks, sticks, and large debris can damage your tiller, so be sure to remove from your lawn before use. Replacing a tiller tine is a common repair task that will improve the performance of your tiller.