AS TOOL CENTER 2pcs 1-Inch / 25mm Diamond Drill Bits, Small Diamond Hole Saw Hollow Core Drill Bits for Glass Ceramic Porcelain Tiles Marble

Description *Package Included: 2 x Diamond Drill Bits. Cutting Hole Diameter is 1"/ 25mm, Shank Diameter is 5/16" / 8.05mm, Total Length is 2.19" / 55.6mm.. *Quality Selection: These diamond drill bits are made of high-speed steel which is high quality and durable. With a nickel-plated coated body to resist corrosion, which has a long service life. Large chip holes to ensure that when the punching smooth, punching accurate.. *Smoothly Cutting: A thicken diamond dust coating on the tops offers superior cutting strength for creates a high precision, smooth cut with no broken edges