High-quality carbide-tipped alloy head material with increased hardness. Carbide drill bits are designed to last longer and maintain sharpness better than conventional steel drill bits. U-type slotted design allows for fast drilling and efficient dust removal. Triangular handle design ensures stable operation. Wide range of applications: the tungsten carbide tip is engineered to penetrate various materials including ceramic tiles, glass, mirrors, plastic, masonry, and wood. When drilling hard materials such as concrete, brick, glass, porcelain tiles, marble, or granite, use water for lubrication. Set includes 7 different sizes: 3mm, 4mm, 5mm, 6mm, 8mm, 10mm, and 12mm. Three flat surfaces on the shaft provide a secure grip, preventing slippage and protecting tile glaze from damage. Rotating thread design enables smooth drilling and chip removal. Spear-pointed tip offers precise positioning, stable drilling, high speed, and reduced risk of breakage. High drilling accuracy for reliable performance. Color: black + silver. Material: carbide. Package contents: 7 x drill bits (3mm, 4mm, 5mm, 6mm, 8mm, 10mm, 12mm). Only the listed items are included; other products are not part of the package. Note: Lighting and display differences may cause slight variations in color between the image and the actual item. Measurement may vary by up to +/- 1-3cm.