4 sizes: 6mm total length is 100mm, 8mm total length is 113mm, 10mm total length is 118mm, 12mm total length is 120mm. Material: the glass drill bit is made of alloy material, which has high hardness, wear resistance and durability. Thoughtful design: the spiral design of the drill can effectively accelerate chip removal, and the triangular handle prevents slipping. Scope of application: the drill is suitable for drilling materials, including concrete, porcelain drill, glass, plastic, wood, etc. (Note that water is used for lubricating hard materials such as glass, porcelain, marble or floor tiles.) Colour: as shown Material: Carbide alloy Package Contents: 4 * 6mm drill bits 2 * 8mm drill bits 2 * 10mm drill bits 2 * 12mm drill bits Only the above package content, other products are not included. Note: Light and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.