About this item 9-PIECE CONCRETE DRILL BIT SET: 5mm. 6mm. 6mm.8mm. 8mm.10mm.12mm.14mm.16mm*160mm; The drilling depth is 100 mm. With this you can drill all common dowel holes. (For your machine and personal safety, it is not recommended to use a three-claw hammer drill) X-SHAPED HEAD: It features an X-shaped geometry with a cross-spline design for optimal disassembly and ease of use. Fully hardened drill bit with a double flute spiral for efficient waste disposal. 2 HOLE SHANK: Round handle two slotted hammer drill bit Regular drilling tools for concrete, granite, stone stone It provides optimal removal of dust and debris with a rounded spiral geometry, more efficiently. CARBIDE DRILLS:The drill set is made of high quality carbide steel, durable and rustproof.The tungsten carbide tipped drill head is harder, stronger and more resistant to extreme loads. APPLICATION:Suitable for drilling holes in concrete, ceramic tile, tile, stone, wood, aluminium, plastic, concrete and multilayer materials / For all drills with SDS-Plus holder such as Bosch, Makita, Hilti, Einhell, Kress and Dewalt and many others (the SDS drill Plus only fits standard SDS Plus, not SDS MAX)