About this product

【Diamond Drill Bits】These drill bit kits are made of upgraded carbon steel with smooth nickel plating surface to resist corrosion, sharp and durable without edge collapse.

【Premium Quality】Coated with high quality diamond to improve drill efficiency and creates a sharp, high precision and smooth cut.

【Hole Saw Set 10 Sizes】1/4", 5/16", 3/8", 1/2", 9/16", 5/8", 11/16", 4/5", 7/8", 1-1/5"，to meet various drill needs.

【Versatile Uses】Diamond hole saw drill bit set kit are used to drill Glass, Porcelain, Ceramic, Marble, Granite Stone, Bottles, SUBEIREYFR, Pots.

【Tips】Please keep adding water when drilling to extend the life.Besides the water lubrication will improve the drilling experience.

1、Start hole at an angle of 45 degrees

2、drill the hole vertically

3、Add water while drilling to improve drill