Features Versatile Application Range: Ideal for drilling into stainless steel, iron, copper, aluminum, wood, and acrylic sheets, making it a must-have for various projects Compatible with Most Drills: Designed to work seamlessly with ordinary pistol drills and electric drills, ensuring compatibility for your existing tools Premium HSS Construction: Crafted from high-quality high-speed steel, these drill bits offer exceptional sharpness and wear resistance for long-lasting performance Enhanced Drilling Efficiency: Engineered for both industrial and household use, these drill bits provide faster drilling speeds to save you time on any task Precision Ground Cutting Edges: The cutting edges are meticulously ground to ensure quick and accurate drilling, delivering superior results with every use Features: 1、Adopts high-quality diamond as material which is strong and . 2、The screw hole is designed for angle grinders and is more labor-saving. 3、The opening is neat and smooth with no broken edges, and does not produce tremor effect. 4、Suitable for marble, ceramic tile, vitrified tile, floor tile, full tile, stone, jade, microcrystalline stone. 5、The hot pring technology makes the blade thick and opening more fast. Specification: Item Type:Diamond Hole Saw Material:Diamond Inner Thread:M10 Size:18mm/20mm/22mm(Optional) Package List: 1 x 20mm Angle Grinder Hole Saw Package List 1 x 20mm Angle Grinder Hole Saw