Rejuvenate your blades and extend blade life Simple to use just cut through and built up residue is removed exposing a new layer of diamond 3/4" X 3/4" X 4" Standard Grit Dressing stone used to clean and resurface diamond blades. Just run the blade through the stone and it will remove built up residue and expose a new layer of diamond adding to the life of your blade. Item measures 3/4” x 3/4” x4”