9pcs Rotary Hammer Drill Bit Set: 5mm, 6mm, 6mm, 8mm, 8mm, 10mm, 12mm, 14mm, 16mm x 160mm. The length of the drill bits is 100mm, so you can drill all common dowel holes. (In order to protect your machine and personal safety, please do not use a three-claw hand drill to drill holes) High-quality material: HPMAISON SDS-Plus rotary hammer drill bit set is made of high-quality carbide steel, which is durable and rust-proof. Tungsten carbide tipped drill bit head is harder, stronger and more resistant to extreme loads. X-Shaped Head Cross Drill Bits: The hammer drill bit set features an X-shaped geometry with cross flute for optimal disassembly and ease of use. Fully hardened drill bit with a double flute spiral for efficient waste removal. 【SDS-Plus Shank】2-hole SDS-Plus hammer drill bit for concrete, granite, stone. It provides optimal dust and debris removal thanks to the rounded spiral geometry, more efficiently. Widely Uses and Applications: Suitable for drilling holes in concrete,