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 dowel holes. (For your machine and personal safety, it is not recommended to use a three-claw hammer drill) X-SHAPED HEAD It features an X-shaped geometry with a cross-spline design for optimal disassembly and ease of use. Fully hardened drill bit with a double flute spiral for efficient waste disposal. 2 HOLE SHANK Round handle two slotted hammer drill bit Regular drilling tools for concrete, granite, stone stone It provides optimal removal of dust and debris with a rounded spiral geometry, more efficiently. CARBIDE DRILLSThe drill set is made of high quality carbide steel, durable and rustproof.The tungsten carbide tipped drill head is harder, stronger and more resistant to extreme loads. APPLICATIONSuitable for drilling holes in concrete, ceramic tile, tile, stone, wood, aluminum, plastic, concrete and multi-layered materials 9pcs masonry drill bit set / perfect ground precision drill bits Heavy duty shank for a maximum durability; Tip design ensures better drill penetration; Pairs perfectly with an electric hammer Dual flutes that provide optimal removal of dust and debris via rounded spiral geometry, more efficiently Suitable for drilling holes in concrete, ceramic tile, stone, wood, metal, aluminum, plastic, concrete and multilayer 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 personal safety, it is not recommended to use a three-claw hammer hand drill X-SHAPED HEAD It features an innovative X-shaped geometry with a unique transverse flute design for optimal disassembly and ease of use. Fully hardened bit with a double spiral for efficient waste evacuation. Optimized flute design Unique, optimized flute design reduces bit stress when drilling, holds the bit cooler and allows dust to be removed quickly. It allows precise starts in materials such as reinforced concrete. SDS - PLUS shank The SDS - PLUS shank is suitable for most rotary hammer drills on the market. Applied to various occasions and meet most of your needs.