【Premium Quality】 DaduoRi 1 1/2 inch diamond core drill bits are made from high-quality tungsten steel and diamond powder, which is more tough and sharper than ordinary steel drill bits. The diamond tip is designed for high-speed rotation and long-lasting performance. 【1 1/2 Inch Core Bits】 The core bits have a diameter of 1.5 inch (38mm), making them suitable for drilling holes in concrete, cured concrete, hard masonry, brick block, solid cement, stucco, and stone. With a drilling depth of 14 inches, they can reach deep into the material for various applications. 【14" Drilling Depth】 The drilling depth of the core drill bit is 14 inches, which is suitable for most applications. It can quickly and easily drill holes in hard materials, saving you time and effort. 【Compatible with】 For use with 1-1/4" - 7 spindle handheld core drills or core drill rigs with stand; use on rotary mode only. 【Versatile Applications】 These 1 1/2" concrete drill bits are perfect for a wide range of projects, including installing electrical boxes, water pipes, HVAC systems, and more. They can be used in both indoor and outdoor environments. This 1 1/2 inch wet core drill bit is designed for concrete, hard masonry, brick block, solid cement, stucco, and stone. It has a 14" drilling depth and a 1-1/4"-7 thread diamond core drill hole saw for cured concrete, hard masonry, brick block, solid cement, stucco, and stone. The core bit is made of high-quality tungsten carbide and diamond, which is durable and sharp, and can be used for a long time.