The invention relates to a barbell weight plate that has first and second bodies hinged together to permit the bodies to be separated or closed. A latch member is carried by one of the bodies and a latch pin by the other to allow the bodies to be latched or locked together. At the center of the bodies when latched together, there is a circular opening extending through both bodies that has a radius of sufficient dimension such that when the bodies are separated, the barbell weight plate may be clamped to compressively engage the curl bar.