RUBI DRYGRES 1/2-in Dry Diamond Core Drill Bit for

The RUBI MINI DRYGRES 4DRILL Kit is the ultimate solution for precision dry drilling in ceramic, porcelain, marble, and granite surfaces. Designed for professional results, this compact kit includes four high-performance diamond drill bits in the most commonly used sizes—Ø1/4", 5/16", 3/8", and 1/2"—all housed in a durable, transparent storage case for easy transport and protection. Featuring advanced VACUUM BRAZED technology, each bit offers superior resistance to heat and friction, while the integrated cooling wax system ensures optimal performance by lubricating the bit during use and helping remove debris. The wax is strategically retained at the tip for consistent efficiency and longer lifespan. Compatible with both corded and cordless drills (without hammer function), the bits also feature a hex shank for secure, quick-fit mounting. Ideal for precision installations of bathroom fixtures and decorative hardware, the RUBI MINI DRYGRES 4DRILL Kit delivers clean, efficient holes with ease and reliability—making it a must-have for tile professionals and serious DIYers alike.