characteristic: Including 6x triangular drill bits (3mm 4mm 5mm 6mm 8mm 10mm) with different specifications to meet daily use requirements. Suitable for drilling on brittle and hard materials such as ceramics, glass, tiles and marble, but not for high-hardness materials such as tempered glass, all-ceramic, vitrified brick and marble. Fast cutting speed and extra cutting life of cemented carbide drill. Perfect for creating holes in tiles. Our glass drill adopts precision tip design to that the drill will not when drilling. Can be installed on electronic grinder, hanging grinder and manual electric drill. These ceramic drills have good wear resistance and extreme hardness, which can prolong their service life and are used in the construction industry because they are sharp and strong enough. describe Name: woodworking drill set Material: steel colour: Silver Package Contents: 1 x Woodworking bit set Only the above package content, other products are not included. Note: Light reflection 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.