5 piece, multi-purpose, drill bit set, drills tile, masonry, wood, metal & concrete, innovative tungsten carbide plate suitable for multi-purpose applications, sharp, multiple diamonds ground cutting edges for a high drilling rate, even in hard materials such as tiles & concretes, sturdy drilling head for a long serviced life in drilling & impact drilling applications, includes the following sizes: 5/32" x 4" x 6", 3/16" x 4" x 6", 1/4" x 4" x 6", 5/16" x 4" x 6" & 3/8" x 4" x 6".