The STIHL weights kit provides you with support for the STIHL BF-MM pick tine and the STIHL BK-MM bolo tine from the STIHL MultiSystem, to increase the weight of the tool on the ground. This results in better power tool balance and means you can apply more pressure during soil cultivation. As a result, the milling blades dig deeper into the soil contributing to better aeration and recultivation of the soil.