Designed for dry drilling in masonry. Drilling into the hardest building materials can be challenging, but with the PRO Core Cutter dry, you will definitely get the job done. It is durable and sharp enough to penetrate all materials. The quality and durability of the PRO Core Cutter dry are evident in its high-quality diamond coating set in a premium metal matrix – ensuring high performance and longevity. With a 22.23 mm bore diameter for standard angle grinders with a clamping nut.