The Husqvarna 542761299 1-5/8 in. Diamond Core Drill Bit for Porcelain and Tile is designed for smooth and rapid drilling. Thin tube and segments with lighter weight enables smooth and rapid drilling especially for handheld applications. Fits a variety of Husqvarna Core Drills including the DM 220, 650, 280, 340, 406 H, and 230.