Abstract: The combination of a lawn mower assembly and a clamp assembly. The lawn mower assembly has a housing defining a cutting chamber, a shaft journalled for rotation in the housing around an axis, and a cutting blade that is selectively a) releasably attached to the shaft to rotate with the shaft in a predetermined path around the shaft axis and b) separable from the shaft as to facilitate reconditioning or replacement of the cutting blade. The clamp assembly includes a first jaw having a first surface and a second jaw having a second surface. The second jaw is movable relative to the first jaw between i) a first relative position wherein the first and second surfaces are spaced from each other a first distance and ii) a second relative position wherein the first and second surfaces are spaced from each other a second distance that is less than the first distance.