The Bosch Carbide-Tipped Rotary SDS-Plus Hammer Bit Set gives you seven bits of different sizes. They feature carbide-tipped drill bit heads that are hard, tough and resistant to extreme loads. The set includes 3/16 in. x 2 in. x 4 in., 1/4 in. x 2 in. x 4 in., 5/16 in. x 4 in. x 6 in., 3/8 in. x 4 in. x 6 in., 1/2 in. x 4 in. x 6 in. bits, and two 1/4 in. x 4 in. x 6 in. bits for a variety of applications. Size: 7.75 In.