Jon Bhandari 50 mm Concrete Core Drill Bit TCT C-124 is made of high-quality metal, ensuring quality, durability, consistency, and stability. This drill bit is primarily used for drilling/cutting holes in Marble, Granite, Concrete, Brick walls & Other Stones, etc. It can be used on brittle/soft as well as hard materials. It can be used in both types of machines, Angle Grinder and Impact Drill.