Securing device of bicycle handlebar stem

A bicycle handlebar stem comprising:

• a body having a connection portion formed on a first end thereof, and a top clamp formed on a second end of the body, the top clamp having a downward portion extending downwardly, the body having a space defined therein, an opening communicating with the space and outside of the body;
• a bottom member having a tongue extending from a first end thereof, and a bottom clamp formed on a second end of the bottom member, the bottom clamp having an upward portion extending upwardly and toward the downward portion of the top clamp, the opening located corresponding to the downward portion of the top clamp and the upward portion of the bottom clamp, the tongue inserted into the space via the opening, a passage defined between the top clamp, the bottom clamp and the body, the passage adapted to receive a handlebar, and
• a connection member extending through the body and the tongue of the bottom member to connect the bottom member to the body, at least one fastener extending through an underside of the bottom clamp and connected to the top clamp.