A clamp assembly includes a body part having a recess of different sizes for holding an elongated structure with different sizes and shapes. A horizontal spaced T-slot is located on a first side surface of the body part at its top and a T-shaped protruding arm is located on a second side surface of the body part at its top. The clamp assembly includes a male locking section with an extended snap arm located on the first side surface of the body part at its bottom and a female locking section with a stopper located on the second side surface of the body part at its bottom. The T-shaped protruding arm is locked into the T-slot and simultaneously the male locking section is locked into the female locking section, such that the clamp assembly is detachably assembled with another clamp assembly.