The Rubi KIT DRYGRES PREMIUM diamond drill bits are the ideal and most economical solution for tilers who need to dry drill holes of various diameters in all types of tiles. Thanks to the high-quality diamond technology and robust finish, this kit offers reliable performance, even with intensive use. Special features Recommended for all ceramic tiles, including porcelain, marble and granite Equipped with VACUUM BRAZED vacuum soldering technology for better heat and wear resistance Developed for dry drilling holes for pipes, drains and connections, among others Can be used directly on angle grinders (M14 connection) or drills with adapter (ref. 05976) Average lifespan: up to approx. 150 holes (Ø 20–85 mm), depending on material, thickness and use Drilling depth: 30 mm (Ø 6–35 mm) and 38 mm (Ø 43–85 mm) Side opening at Ø 20–85 mm for better cooling and easy removal of drilling residue Segmented models (Ø 43–85 mm) for extra stability during drilling Maximum speed: 14,000 rpm For optimal lifespan: use a pendulum motion and maintain the recommended speed Technical data Drill diameters (depending on kit): 28, 35, 43 and 68 mm (ref. 51931) 28, 35, 43, 50 and 68 mm (ref. 51937) 6, 8, 20, 35, 50 and 68 mm (ref. 51929) Connection: M14 thread Drilling depth: 30–38 mm (depending on diameter) Avg. lifespan: approx. 150 holes Max. speed: 14,000 rpm Standard included 1× Multidrill guide Diamond drill bits (depending on kit: see options above) 1× Rubi case