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.