Abstract: Walk behind power tools are provided. A walk behind power tool includes a housing; a power source; a motor selectively powered by the power source; a drive shaft; a handle; and a handle adjustment system. The handle adjustment system can be configured to move between different positions relative to the housing. The system can include a handle adjustment grip; at least one cable coupled to the handle adjustment grip at a first end and coupled to a locking wedge at a second end; and a spring. Engagement of the handle adjustment grip in a first direction enables the handle position to be moved relative to the housing. The power tool may have a plurality of cutting assemblies each powered by a respective motor. The power tool may be self-propelled and include a speed control assembly.