A screwdriver includes a shank with a handle connected to a collar rotatably and a base is located in a room of the handle. At least one resilient extending from the underside of the collar is inserted in at least one recess of the handle. The base connected to the outside of the collar has a rod connected to a positioning member. The positioning member is defined with multiple slots able to hold bits in position in the room. One side of the base is sealed by a cap. Therefore, the bits are received inside of the handle so as to carry with the screwdriver.