Description: Quality Materials: These diamond grinding heads are made of quality metal material, and the surface is plated with diamonds, that is, the bonding surface is double-plated to ensure no peeling, high strength, and long life, allowing you to use them with confidencePractical Design: The glass grinding tool adopts a standard frosted design, will not stick to the shaft of the grinder; The grinding bits is chrome-plated and hardened to improve performance, strength and practicaltyMultisize to Choose: you will receive 3 pieces of diamond grinding bits in 3 sizes, namely, 2.5cmx3.5cm/0.98inchx1.38inch, 1.7cmx3.2cm/0.67inchx1.26inch,1.5cmx3.4cm/0.59inchx1.34inch, different sizes and complete combination to fully meet your needsHigh Working Efficiency: These diamond grinding bits make the glass grinding faster and help the work to be completed more efficiently, which are really practical and necessary tools in your toolboxWidely Use: Glass grinding are suitable for forming and drilling of hard materials such as ceramic tiles, glass, colored glass, stone, etc., also proper for shaping most types of glass, ceramic tiles, stone and similar materials, and work well for glass grinders of most Specification: Material:Metal Size Chart: 2.5cmx3.5cm/0.98inchx1.38inch1.7cmx3.2cm/0.67inchx1.26inch1.5cmx3.4cm/0.59inchx1.34inch Package Includes: 3 Diamond Grinder Bits Note: Please allow slightly errors 1-2cm/0.39-0.79inch differences due to manual measurement.