Abstract: An edge dressing grinder tool used for making a continuous straight, vertical edge on a concrete, natural stone or artificial stone slab used for a countertop or table. The tool includes a manually operated hand grinder with a perpendicularly aligned grinding disc or pad mounted on a drive shaft. Attached to the head of the grinder is a forward extending, longitudinally aligned bracket. Extending laterally from the bracket are two slide arms and an adjustment rod. Mounted on the distal ends of the slide arms is a guide plate with a low friction, sliding plate. Mounted along the rear edge of the guide plate are two, transversely aligned wheels that press against a raised edge formed on a rigid fence that is fixed in position on the top surface of the work piece and parallel to the edge. The end of the adjacent rod engages a nut assembly mounted on the slide plate that allows the distance between the grinder's head and the guide plate to be selectively adjusted.