Package includes: 8pcs diamond drill bits in sizes 0.8, 1.0, 1.2, 1.5, 1.8, 2.0, 2.5, and 3.0mm, one piece per size. This set offers a variety of sizes to meet different drilling requirements. Material: Diamond with spiral design for enhanced toughness and hardness, resistant to breaking. The sharp tip allows efficient cutting and easy chip removal. Compatible with rotary tools such as hand drills, pillar drills, flexible shafts, and angle grinders. Ideal for drilling small holes in glass, metal, shells, jade, beads, marble, stone, plasterboard, and wire. Performance may vary depending on material hardness. Using coolant during operation can improve efficiency and extend tool life. Item specifications: Material: Diamond; Type: Set; Sizes: 0.8 / 1.0 / 1.2 / 1.5 / 1.8 / 2.0 / 2.5 / 3.0 mm; Color: Silver; Quantity: 8 pieces.