🔨 Drill Your Way to Perfection! Drill dozens of holes without breaking a sweat. Designed for a perfect fit on polishers and grinders. Use it wet or dry for maximum flexibility. Optimal performance at 3000-6000 RPM. Drill through granite and concrete like a pro! Wet or dry use 5/8" thread compatibility 3000-6000 RPM speed The SCB0400D 4-Inch Monster Dry/Wet Diamond Core Drill Bit is engineered for professionals seeking to drill through tough materials like granite and concrete. With a 5/8" thread that fits standard polishers and grinders, this drill bit offers the flexibility of wet or dry use and is designed to last for dozens of holes, making it a reliable choice for any job site.