• Set of 5 diamond drill bits with a diameter of 8mm. • Total length of each drill bit: 65mm. • Diamond coating height: 10mm. • Diamond grit: #50/60. • Triangular shank with a diameter of 10mm. • Suitable for dry or wet drilling in materials such as ceramic, porcelain, granite, marble, artificial stone, and quartz. • The drill bits contain cooling wax inside, which facilitates heat dissipation and chip evacuation, allowing for dry drilling without the need for water. • Vacuum brazing technology and high-quality diamond grit provide fast and smooth drilling, as well as a longer lifespan. • Recommended for use with corded, cordless, and tabletop drills. Recommended speed: 2000-5000 RPM. Higher RPM results in a longer drill bit lifespan. • For use with an angle grinder, the corresponding drill chuck must be installed.