1The key material of the product is diamond, which has very high hardness and long service life. 2The product is suitable for various types of grinding machines, grinding wheel trimming. 3Clears unwanted debris and impurities from your grinding wheels revealing sharp clean cutting surfaces. 4The shank diameter of dressing tool is 1cm / 0.4in. 5Simple and practical tool to get your grinding wheel working again. Feature: The key material of the product is diamond, which has very high hardness and long service life. The product is suitable for various types of grinding machines, grinding wheel trimming. Clears unwanted debris and impurities from your grinding wheels revealing sharp clean cutting surfaces. The shank diameter of dressing tool is 1cm / 0.4in. Simple and practical tool to get your grinding wheel working again. Specification: Material: Diamond Shank diameter: 1cm / 0.4in Product dimension(L*W): 6.4 * 2cm / 2.5 * 0.8in Package list: 1 * Diamond Dressing Tool Note: The actual product color may deviate from the photo due to light. There may be a slight deviation in the measurement of product.