The Hex-9 MultiConstruction drill bit offers stable drilling in all materials. Bosch's own carbide blend and diamond-ground cutting edges make the drill bit wear-resistant, while the double-spiral U-shape ensures good chip transport and a long lifespan. Additionally, the carbide tip allows for easy starting and good guidance while drilling. The drill bit is suitable for practically all materials in interior construction work, such as soft concrete, masonry, bricks, cement, lightweight building materials, multilayer materials, ceramics and tiles, wood, plastic, thin sheet metals, and aluminum. It features a 1/4" hex shank for use in cordless drills and impact drill chucks with a 1/4" tool holder. The set includes 8 multi-purpose Hex-9 Multi Construction drill bits with diameters: 3 / 4 / 5 / 5 / 6 / 6 / 8 / 8 mm, total lengths: 90 / 90 / 100 / 100 / 100 / 100 / 100 / 100 mm.