【Premium Quality】 DaduoRi 5 inch diamond core drill bits are made from high-quality tungsten steel and diamond powder, which is more durable and sharper than ordinary steel drill bits. The diamond tip is designed for high-speed rotation and long-lasting performance. 【5 Inch Core Bits】 The core bits have a diameter of 5 inch (127mm), 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】 The 5 inch concrete drill bit is 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. The DaduoRi 5 Inch Wet Core Drill Bit is a versatile tool for drilling holes in concrete, hard masonry, brick block, solid cement, stucco, and stone. It features a 14" drilling depth, a 1-1/4"-7 thread diamond core drill hole saw. The 5 core drill bit diamond-tipped is designed to cut through tough materials with ease, and the wet core drill bit is perfect for use in concrete, masonry, and other hard surfaces. With its durable construction and easy-to-use design, this drill bit is a must-have for any professional contractor or DIY enthusiast.