The present invention provides a system for a vertical roller grinding blade and a grinder including the same, the blade including an outer blade having a hollow space formed therein; and an inner blade which can be installed to be rotated by a rotating shaft in the hollow space of the outer blade and includes at least two eccentric rollers installed to each other such that a center line and a rotation axis of each of the at least two eccentric rollers are misaligned and eccentric to each other, wherein the center lines of the at least two eccentric rollers are misaligned and eccentric to each other.

The present invention provides a vertical roller-type grinding blade and a grinder including the same, the blade comprising: an outer blade having a hollow space formed therein; and an inner blade which can be installed to be rotated by a rotating shaft in the hollow space of the outer blade and includes at least two eccentric rollers installed to each other such that a center line and a rotation axis of each roller are misaligned and eccentric to each other, wherein the center lines of the eccentric rollers are misaligned and eccentric to each other.

A land preparation tool includes a tool body having a longitudinal axis, wherein the tool body includes a cutting surface and a mounting surface disposed on the tool body opposite the cutting surface, wherein the mounting surface includes an apex that extends along about half of the mounting surface parallel to the longitudinal axis and first and second side mounting surfaces that extend from the apex; a blade disposed on the same side of the tool body as the cutting surface; and a channel disposed into the mounting surface and extending into the tool body.