General description Diamond drill bits, also known as diamond core bits or diamond hole saws, are versatile tools designed for drilling through various materials including glass, ceramic, porcelain, limestone, slate, marble, granite, and fiberglass. This set is ideal for making clean and precise holes in glass and tile, making it a great choice for DIY enthusiasts. Technical specifications Material: High speed steel Diameter options: 10mm, 25mm, 40mm, 55mm, 70mm, 80mm, 100mm Installation Works best with a standard electric drill (not included) Start your hole diagonally to create a round trace and hold the drill straight Usage Always use lubrication (water) to prevent the diamond drill bit from burning Suitable for drilling into stone, tile, ceramic, glass, and granite Other information Package Contents: 7 Pcs Diamond Coated Drill Bits Good performance and long life This diamond drill bit set makes a great gift for any DIY enthusiast