There are thousands of kinds of diamond tools. They can be categorized by their manufacturing methods and their uses. But Metal Powders are used in Metal-bonded diamond tools. The tool's bonding material is sintered metal containing diamond grit. The functional parts of the tool are usually diamond segments, diamond beads. These tools include metal-bonded diamond saw blades, diamond grinding cup wheels, diamond core drill bits, etc. For metal-bonded diamond tools, the bond is one of the prime factors when selecting which tool to use for cutting or grinding a specific material, depending on how hard or abrasive the material is. The bond used dictates the rate at which the metallic powders wear down and expose new diamond crystals at the surface, thereby maintaining an abrasive cutting surface. Different bond strengths are achieved by the alloy mix of metallic powders chosen and how much heat and pressure are applied to the sintered segment. The reference material has historically been cobalt, thanks to high diamond retention, ease of processing by hot pressing and adjustable wear rate by admixed bronze or tungsten carbide powders. Due to its high and unstable price and to environmental concerns, alternative systems have been developed based on iron-copper alloys or mixtures, with further metallic and nonmetallic additions.