Use for precision sharpening of all your blades and tools. This 1800 grit diamond hand pad has one cutting face with diamonds which are 20 micron. Open dot pattern provides aggressive cutting action and reduces loading. Flexible backing conforms to irregular surfaces. Pad is color-coded blue for easy grit identification. Use wet or dry. Great for glass work too — takes the sharp edge off after cutting. Cutting face measures 3-3/4″L x 2-1/4″W. Also available in a set of all six grits.