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 DRILL BITS: The drill bit set is made of carbide steel high quality, durable and rust resistant. Tungsten carbide tipped drill head is harder, stronger and more resistant to extreme loads; high-density drilling and fast 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 drill 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 tile, stone , wood, aluminum, 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. (SDS Plus drill only fits standard SDS Plus, not SDS MAX)