Diamond drill sizes - This is a great value set of 5 pieces: 3/4" (0.75 inch), 1 inch, 1 1/4" (1.25 inches), 1 1/2" (1.5 inches), 1 3/4" (1.75 inches)
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Steel and nickel coated material - These drill coated hole saws are made from steel and nickel coated material, the drill head is covered by diamond particles, sturdy
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Clean and accurate hole - Can drill a complete clean and accurate hole from hard surface, no broken edges and no tremor phenomenon, long service life, durable
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