General description The RoseDiamond Hole Saw is a multifunctional drill bit designed for various materials including tile, concrete, wall, and glass. With a diameter of 90mm, this tool is ideal for both professional and DIY projects. Technical specifications Diameter: 90mm Design: Segmented for reduced cutting resistance Shank type: Triangular drill shank for enhanced torsion resistance Installation Compatible with bench drills, hand drills, and drill presses (not suitable for hammer drills) Drill at a vertical position with an oblique angle of 45 degrees Recommended speed: 800-1000 RPM Usage Suitable for drilling into stones, ceramics, and glass Keep adding water during use to cool the holes