Bispecific T Cell Engagers (BiTEs) are a class of engineered antibodies designed to facilitate the engagement of T cells with cancer cells. BiTEs are essentially two antibodies fused together; one arm binds to a specific antigen on the cancer cell, while the other arm binds to CD3, a receptor on T cells. This simultaneous binding brings T cells in close proximity to cancer cells, enabling the T cells to exert their cytotoxic effects more efficiently.