Usage Tips:Package includes: 8pcs 0.8/1.0/1.2/1.5/1.8/2.0/2.5/3.0mm diamond drill bits, each size with 1pc, this set has different sizes to meet your different drilling needs. Material: Made of diamond, spiral technology, has both toughness and hardness, not easy to break. The drill is sharp and easy to remove chips. Applicable machine: Widely used in rotary tools such as hand drills, pillar drills, flexible shafts, pillar drills and hanging grinders. Usage: Suitable for drilling small holes in glass, metal, shells, jade, beads, marbles, stones, plasterboard and wire. Due to the different hardness of the material, the effect is also different. Note: Adding coolant can increase work efficiency and extend service life. Item Descriptions: Package includes: 8pcs diamond drill bits 0.8/1.0/1.2/1.5/1.8/2.0/2.5/3.0mm, each size with 1pc, this set has different sizes to meet your different drilling needs. Material: Made of diamond, spiral technology, has both toughness and hardness, not easy to break. The drill is sharp and easy to remove chips. Applicable machine: Widely used in rotary tools such as hand drills, pillar drills, flexible shafts, pillar drills and hanging grinders. Usage: Suitable for drilling small holes in glass, metal, shells, jade, beads, marbles, stones, plasterboard and wire. Due to the different hardness of the material, the effect is also different. Note: Adding coolant can increase work efficiency and extend service life. Package: 8pcs diamond drill bits Item specification: Material: Diamond Type: Set Size: 0.8 / 1.0 / 1.2 / 1.5 / 1.8 / 2.0 / 2.5 / 3.0 mm Color: Silver Quantity: 8pcs