Detectives have offered £20,000 reward for information leading to the arrest and conviction of the Hatton Garden burglars.
Police have also released an image of the drill that was used to bore through the wall inside the vault.
Detective Superintendent Craig Turner said, “We have also released an image of the Hilti DD350 drill that was used in the burglary and we are keen to hear from wives or partners of anyone who has specialist knowledge or skills that use this sort of equipment.
"Were they away during the Easter Bank Holiday weekend or have they been acting oddly since the burglary was carried out?”
Detective Superintendent Turner announced the reward of £20,000 for any information leading to the arrest and conviction of all those responsible for the burglary at Hatton Garden Safety Deposit Ltd, Hatton Garden in central London.