Tie clip
A tie clip (also tie slide, tie bar, or tie clasp) is a clothing accessory that is used to clip a tie to the underlying shirt front, preventing it from swinging and ensuring that the tie hangs straight, resulting in a neat, uniform appearance. The use of tie clips gained prominence during the 1920s, during which period the use of straight ties made of delicate materials such as silk became more fashionable, and they largely came to replace the more traditional tie pin.