set of 4 diamond drill bits, suitable for ceramic tiles, porcelain, glass and stone. Professional diamond drill bits: 6 mm, 8 mm, 10 mm and 12 mm.

Size: Set of 4 diamond drill bits. Diamond drill bits suitable for tiles, granite, marble, stone, bricks, etc. Specifications: Materials: Stainless steel and diamond coating; Shank diameter: 6 mm; Diamond coating thickness: Up to 10 mm; Sizes: 6 mm, 8 mm, 10 mm, 12 mm. Packaging: 4 vacuum-brazed diamond drill bits. Instructions for use: Instructions for using vacuum-brazed diamond drill bits: 1. Do not use the hammer drill function. 2. Use only a corded drill; do not use a cordless drill (insufficient power). 3. Suitable only for drilling tiles; not recommended for materials on the back of tiles. 4. When drilling horizontally, apply light pressure; when drilling vertically, the weight of the drill is sufficient. Please follow these instructions to begin drilling: 1) Position the drill bit at a 45-degree angle. 2) Drill until the hole begins to form. 3) Straighten the drill bit. 4) Continue drilling in a circular motion.