9PCS DRILL BIT SET: 5-PCS cross drill 5mm.6mm.8mm.10mm.12mm*160mm Drilling depth is 100mm. With this you can drill all common dowel holes. 4PCS drill 2*pointed chisel (16*1cm, 25*1.5cm), 2*flat chisel (16*1.5cm, 25*2cm). The SDS-plus system, tool-less drill and different sizes of chisels can save you a lot of time and effort. CARBIDE DRILLS: The drill bit set is made of high quality carbide steel, which is durable and rustproof. Tungsten carbide tipped drill head is harder, stronger and more resistant to extreme loads; high-density drilling and rapid waste disposal. Unique cross-groove design achieves the best disassembly and ease of use. PRECISE ASSEMBLY WORK: The U-shaped groove design is wider and deeper, which can remove debris quickly, reduce the stress of the bit to make the bit work smoothly and work longer. RENOVATION WORK AND CATERING: With the ergonomically folded working end, you can easily remove floor and wall tiles. This set is suitable for demolition and correction work in concrete and for drilling in masonry. END OF WORK ERGONOMIC ANGLE: Tile chisel for easy removal of rotary hammers from: AEG, Bosch, DeWalt, DUSS, ELU, Hilti, Hitachi, Kango, Kress, Makita, Metabo, Milwaukee, Wacker. See more details.