An attack on a 73-year-old woman during a robbery at her Surrey home was so horrific police are hoping the criminal world will turn in those responsible.
Francoise Jansen was gagged, water-boarded and had boiling water thrown over her in the attack in St George's Hill, Weybridge.
She escaped after biting through electrical cables used to tie her wrists to a radiator.
Describing her two attackers, she said: "They are evil - so cruel."
The attackers wore balaclavas, dark clothing and gloves, during the robbery, which took place between 22:50 BST on Friday and the early hours of Saturday,
Mrs Jansen said: "One went behind the chair and held my mouth and the other one took me by my arms.
He said: "What type of man would subject a 73-year-old woman to this type of attack?"
Mr Preston said the robbery was "sheer hell" for Mrs Jansen.
"It was only that she managed to free herself and alert local security on the estate that we got to her, fortunately before she suffered injuries that were too severe," he said.
Mr Preston said Mrs Jansen had undergone a "shocking experience".
"We do know the two men were dressed in dark clothing and wearing balaclavas and gloves. We suspect there was a vehicle fairly nearby although we have no description of that."
Officers are also working closely with second-hand jewellery outlets in case they are offered items from the haul of expensive jewellery taken after Mrs Jansen was forced to open the safe.