General description High-quality diamond drill bits designed for economical and fast cutting. Made from high-strength nickel-plated carbon steel, these durable and precise drill bits feature an 80 grit diamond coating for enhanced drilling speed and sharpness. This set includes 10 pieces with diameters ranging from 8mm to 50mm, making it suitable for various applications. Technical specifications Material: Nickel-plated carbon steel Diamond coating: 80 grit Sizes included: 8mm, 10mm, 12mm, 14mm, 16mm, 18mm, 20mm, 22mm, 25mm, 50mm Compatibility and accessories Compatible with all electric drills and impact drills Installation Start drilling diagonally to create a round mark, then proceed to drill straight. Usage Suitable for drilling holes in glass, marble, tile, block jars, fiberglass, porcelain, ceramic tile, slate, granite, and light stone. Always use water for lubrication to prevent overheating and prolong the life of the drill bits. Other information Package content: 10 x Diamond