Quality materials: these diamond grinding heads are made of quality copper 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 confidence Practical design: the stained ceramic glass abrasive tool adopts a standard frosted design, and the brass core reduces shaft binding and will not stick to the shaft of the grinder; The drill bit is chrome-plated and hardened to improve performance, strength and durability Multi-size to choose: you will receive 3 pieces of diamond grinding bits in 3 sizes, namely, 1 inch, 3/4 inch, 1/4 inch, along with 3 matching allen wrenches, different sizes and complete combination to fully meet your needs High working efficiency: these diamond drill bits in MCB01, MCB34, MCB14 make the glass grinding faster and help the work to be completed more efficiently, which are really practical and necessary tools in your toolbox Wide range of