Auniwaig Diamond Drill Bits, 30mm Hole Saw Diamond Drill Bit Hollow Core Drill Bit for Diamond Coating, Glass, Ceramics, Porcelain, Ceramic Tile, Marble, 2 Pcs

Drilling Diameter: 30mm / 1.18-inch; Drilling Depth: 25mm / 1- inch; Total Length: 50mm / 2-inch; Material: Carbon Steel, Alloy Steel; Surface Treatment: Nickel Plating.

These diamond drill bits made of low carbon steel and alloy steel that is durable and have a long service life, which are high quality and good performance that excellent for making clean and accurate hole.

Coated with high quality diamond, the diamond hole saw creates a high precision, smooth cut with no broken edges.