Images of the hole drilled by thieves into the vault at a Hatton Garden safe deposit company have been released by the Met Police.
In the vault, discarded safe deposit boxes, power tools including an angle grinder and concrete drills, and crowbars can be seen. No arrests have been made.
The image shows the hole made using a heavy duty drill, a Hilti DD350.
It measured 50cm (19.7in) deep, 25cm (9.8in) high, 45cm (17.7in) wide and sits 89cm (35in) above the floor.
Police have also released a graphic showing the break-in.
The Met are currently reviewing how they responded to the raid after it emerged an intruder alarm had gone off at the scene of the crime but it decided a response was not required.
Det Supt Craig Turner, head of the Flying Squad, said: "The hours of forensic work and inquiries have been vital in order to ensure we are able to exploit all investigative opportunities to their fullest extent and assist us in identifying those individuals responsible.
Read More: www.bbc.com/news/uk-england-london-32414531