Abstract: A rotary apparatus which can be detachably mountable to a self-propelled vehicle, such as a skid-steer front end loader. The apparatus includes opposing first and second frame members and an axially rotatable work implement having front and rear peripheries and left and right peripheries. The rotary apparatus provides a mechanism for supporting the work implement from the first and second frame members such that the front, rear, left and right peripheries may extend beyond the fronts of the frame members. A mechanism for shifting the position of the work implement in a direction parallel to a line between the first and second frame members is provided such that either one of the peripheries of the work implement may extend beyond the side edge of the first frame member. The capability to shift the work implement beyond the sides of the frame members allows the apparatus to be used to horizontally plane adjacent a vertical wall or obstruction, such as a curb.