SET OF 9 CONCRETE DRILLS: 5mm. 6mm. 6mm.8mm. 8mm.10mm.12mm.14mm.16mm*160mm; The drilling depth is 100 mm. With this you can drill all common stud holes. (For your machine and personal safety, it is not recommended to use a three-prong impact drill) X-SHAPED HEAD It features an crossed splines for optimal disassembly and ease of use. Fully hardened drill bit with a double flute spiral for efficient waste removal. 2 HOLE SHANK Round Handle Two Slot Impact Drill Bit Regular Drilling Tools for Concrete, Granite, Stone It provides optimal removal of dust and debris through rounded spiral geometry, more efficiently. CARBIDE DRILLS The drill bit set is made of high quality carbide steel, durable and rust-proof.The head of tungsten carbide tipped drill bit is harder, stronger and more resistant to extreme loads. APPLICATION Suitable for drilling holes in concrete, ceramic tile, stone, wood, l aluminum, plastic, concrete and multi-layer materials 9pcs masonry drill bit set \/ perfect ground precision drill bits Sturdy shank for maximum durability; The tip design ensures better penetration of the drill bit; Pairs perfectly with an electric hammer Double flutes that provide optimal removal of dust and debris via rounded spiral geometry, more efficiently Suitable for drilling holes in concrete, ceramic tiles, stone, wood, metal, aluminum, plastic, concrete and multi-layer materials. SET OF 9 DRILLS 5 mm, 6mm, 6mm, 8mm, 8mm, 10mm, 12mm, 14mm, 16mm * 160mm; The drilling depth is 100 mm. With this you can drill all common dowel holes. Note: For your machine and your personal safety, it is not recommended to use a three-prong impact hand drill X-SHAPED HEAD It features innovative X-shaped geometry with a unique transverse flute design for optimal disassembly and ease of use. Fully hardened drill bit with a double spiral for efficient waste disposal. Optimized flute design Unique, optimized flute design reduces drill bit stress when drilling, holds the drill bit cooler and allows dust to be quickly removed. It allows precise starts in materials such as reinforced concrete. SDS - PLUS shank The SDS - PLUS shank is suitable for most rotary impact drills on the market. Applied to various occasions and meets most of your needs. Note: The data are all manual measurements, please allow 1 - 3cm error, due to the difference in light and temperature. display, there will be a certain color difference, depending on the physical object received Delivery quantity: (according to the main picture)