Abstract: An apparatus wherein a platform mounts an electric drive for selective use and cooperation with a manual crank to rotate a drum supporting shaft to rotate a drum in cooperation with a chute, wherein the chute includes a convex grinding surface to receive members therethrough to grind such members in cooperation with a multi-lobed drum. The drum lobes are optionally provided for selective replacement utilizing lobes of a multi-ribbed construction in cooperation with an initial and primary shell cracking rib.