T.M. Lewin Dual End Black Braces
T.M. Lewin Dual End Black Braces

The black braces are visible on this No Time To Die poster.
photo via ambito.com
James Bond (Daniel Craig) wears T.M. Lewin Dual End Black Braces with his Tom Ford tuxedo in No Time To Die.
The braces are black, with black leather and both leather end pieces (to connect to buttons) and metal end pieces (to clip on the trousers).
The T.M. Lewin Dual End Black Braces are available at T.M. Lewin for £75 / $100 / / €90 (on sale for £37.50 / $50 / €45).
The tuxedo worn by Bond is a Tom Ford tux, similar to the Atticus model, custom made by costume designer Suttirat Anne Larlarb.
In the film, James Bond receives his tuxedo outfit from FBI agent Paloma (Ana De Armas) in Cuba. She hands him the tuxedo and presumably also the braces in a Bennett Winch Suit Carrier.
Thanks to whatsdanielwearing for the ID