This Matrix Granite Drill Bit M14 6-120mm x10 is designed for the highest quality and performance. Its diamond core drill allows for wet drilling on a full range of materials, from Reinforced Concrete, Asphalt, Block, Pavement, Brick, etc. This drill bit is perfect for drilling through the toughest 1-3/8" granite or engineered stone countertop at the job site without using water. With a delivery time of 4-6 weeks from production, it's the perfect choice for any tiling job. You'll receive x10 of each size you order.