FACHLICH Diamond Core Drill Bits 25mm 2PK Granite Hole Saw Wet Drilling for Concrete Countertops Marble Artificial Stone Limestone

Dimension: Diameter 25mm, 2pcs, Diamond height: 8mm; Total length: 68MM, Thread: M14 thread, Grit: #35/45 Designed multi-purpose for drilling the mounting holes in masonry, marble, limestone, and concrete (countertops only). Great for faucet mounting holes in stone and concrete countertops. Can be used dry when water is not an option, but to prolong its using life, must be used with water for cooling and lubrication. Small incision resistance,feature drilling stably, fast speed, not breaking the border. Machine: standard cordless or electric drill.