[9-Piece Drill Bit Set]: 5mm, 6mm, 6mm, 8mm, 8mm, 10mm, 12mm, 14mm, 16mm x 160mm, drilling depth: 100mm. This allows you to drill all common dowel holes. (For safety reasons for your machine and yourself, the use of the three-claw hammer drill is not recommended.) [Carbide Drill Bits]: The drill bit set is made of high-quality hard alloy steel, which is durable and rust-resistant. Carbide-tipped drill bits are harder, tougher, and can better withstand extreme loads. High-density drilling and fast waste removal. [X-Shank Head]: It features an innovative X-shaped geometry and a unique cross-groove design, allowing for optimal disassembly and easy operation. Fully hardened drill bit with double helical cutting edge for efficient debris removal. [2-HOLE SHANK]: Round handle double-hole drill bit, conventional drilling tools in a separate red case, for concrete, granite and stone. Its circular helical geometry ensures more efficient removal of dust and dirt. [Application]: Suitable for