With the 48-piece BOSCH drill bit and bit set with magnet rod, they are best equipped for all situations. The set's six metal drills are coated with a titanium nitride coating for long life and high strength. The six stone drills included in the set are equipped with an impact-resistant carbide tip for working in masonry, natural stone and artificial stone. The five wood drills in the set have a centering tip for pinpoint drilling. They are suitable for hardwood, softwood and plastic. The 48-piece drill and bit set also includes 23 bits with Phillips, Pozidriv, Torx, hexagonal and longitudinal slot head in all popular sizes.