Bulldog, 7 piece, hammer drill bit set, set consists of: 3/16" x 2" x 4", 1/4" x 2" x 4", 5/16" x 4" x 6", 3/8" x 4" x 6", 1/2" x 4" x 6" & (2) 1/4" x 4" x 6" hammer drill bits, optimized brazing & hardening process for long life, for handling variety of applications, carbide tips are tougher & more durable under heavy loads, brute tough storage case for easy access, organizing & portability.