【Wet Core Drill Bits】 These 3 1/2 inch core drill bits are specially designed for wet drilling, which is more efficient and safer than dry drilling. They are made of high-quality tungsten carbide and have a diamond-coated tip for long-lasting performance. 【Compatible with】 For use with 1-1/4" - 7 spindle handheld core drills or core drill rigs with stand; use on rotary mode only. 【Reliable and Long-lasting】 The 3 1/2" core bits are made of high-quality materials and have a long lifespan.They feature uniform distribution and large diamond for fast-speed. 【14 Inches Drilling Depth】 With a drilling depth of 14 inches, they can reach deep into the material for various applications. Making the 3 1/2 inch concrete core bit suitable for drilling holes in cured concrete, hard masonry, brick block, solid cement, stucco, and stone. 【Versatile Applications】 These 3.5 inch concrete core drill bits adopt new materials and advanced sintering process and welding process, which significantly improves the sharpness and resistance of this concrete hole saw. This 3 1/2" Wet Core Drill Bit is designed for drilling holes in concrete, hard masonry, brick block, solid cement, stucco, stone, and other materials. It features a 14" drilling depth,1-1/4" - 7 thread diamond core drill hole saw, and is made from high-quality materials for long-lasting use. The diamond core drill bit is suitable for various applications, including home improvement, construction, and more. It is easy to use and provides a precise and efficient drilling experience.