The diamond plated T-bar wheel dresser has a 36-50 grit diamond abrasive that will dress the surface of your grinding wheels. With its clean, flat, sharp cutting surface, you can easily clean the surface facing of unwanted impurities and debris. Use it to ensure that your grinding wheel runs true and restore its cutting ability after it has become out-of-round. Overall dimensions: 4-5/8" x 1 3/4″ x 1/2″ head 1/2″ aluminum knurled handle