The Original Einhell 15-piece drill bit set is a matching accessory set for heavy-duty work using percussion drills and power screwdrivers. The versatile selection of drill bits, consisting of five drill bits (Ø 10, 8, 6, 5, 4 mm) of each type, facilitates heavy-duty drilling into masonry or concrete. Five tough drill bits are ideal for drilling into wood, another five carbide-tipped drill bits can be used for drilling into masonry, stone or concrete. The five HSS drills are suitable for drilling into steel or metal. A total of 15 drill bits are included, supplied in three storage boxes each holding 5 drill bits.