9PCS DRILL SETS: 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) CARBIDE DRILLS: The drill bit set is made of high quality carbide steel, which is durable and rust resistant. The tungsten carbide tipped drill head is harder, stronger and more resistant to extreme loads; high density drilling and rapid waste disposal X-SHAPED HEAD: It features an innovative X-shaped geometry with a unique cross-spline design for optimal disassembly and ease of use. Fully hardened drill bit with a double flute spiral for efficient waste disposal. 2-HOLES SHANK: Round handle, two hole drill bit, regular drilling tools in individual red box for concrete, granite, stone. It provides optimal removal of dust and debris via rounded spiral geometry, more efficiently. APPLICATION: Suitable for drilling holes in concrete, ceramic tiles, stone, wood, aluminium, plastic, concrete and multilayer materials / For all drill bits with SDS-Plus holder such as Bosch, Makita, Hilti , Einhell, Kress and Dewalt and many more. (The SDS Plus drill only fits standard SDS Plus, not SDS MAX)