10 piece set of diamond-coated hollow core drill bits, also known as diamond hole saws. There are ten bits in total and 6-50mm in diameter.

These tools are widely used for making clean and accurate holes in materials such as:

Glass

Ceramics and ceramic tiles

Porcelain and porcelain tiles

Stone; marble, granite, limestone, and slate

Fiberglass

They are designed for use with standard hand drills or bench drills. It is important to use water as a coolant during operation to ensure a longer service life and increase effectiveness.