UNIQUE OFFSET DESIGN: These drill bits alternate between two cutting edges on one side and a single edge on the other,providing the stability of a cross drill with the sharpness of a single-edge drill. DRY DRILLING EFFICIENCY: Ideal for low-speed, dry drilling applications, especially when overhead drilling isn't feasible.Perfect for drilling into materials like concrete, where precision and efficiency are crucial. VERSATILE: This set includes five versatile sizes, with a total length of 90mm and a maximum drilling depth of 50.8mm. Whether you're working with marble, porcelain, ceramic, or concrete, these bits offer reliable performance and adaptability across various materials. WIDE COMPATIBILITY: Designed with a hex shank, these drill bits are compatible with a wide range of tools, including hand drills, bench drills, and impact drills. Bit size: 6mm, 8mm, 10mm, 12mm, 14mm Length: 90 mm Colour:As Shown Material:Tungsten steel alloy Package Contents: 1set x 6/8/10/12/14mm Glass Tile Ceramic Punching 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.