A husband and wife were left with multiple injuries after baseball bat-wielding burglars attacked them.
The victims were also bound up with cable ties during the attack.
The pair were asleep when three men wearing balaclavas entered their home in Highcross Road, Southfleet by forcing the back patio doors with a paving slab at around 10.15pm on July 1.
The offenders got in to the bedroom and assaulted the husband and wife.
Before leaving, the three men broke into a safe and stole jewellery, cash and personal items.
Both victims were taken to hospital, with the husband suffering from a broken jaw, fractured eye socket, severe swelling and bruising.
He has since undergone surgery to treat some of his injuries.
His wife also suffered a fractured eye socket as well as other injuries.
Investigating officer Detective Constable Alan Poulton said: "This was a violent robbery by offenders who knew what they wanted.
"This was an isolated incident, albeit an incredibly frightening one for the gentleman and his wife, who were asleep when these men forced their way into their home.
"We are pursuing a number of lines of enquiry but would very much like to hear from anyone who may have information about the robbery.
"This was an isolated incident, albeit an incredibly frightening one for the gentleman and his wife, who were asleep" - DC Alan Poulton
"If you saw anyone acting suspiciously in the area at the time of the offence or have been offered unique jewellery recently at discounted prices, we want to hear from you as soon as possible.’
A cash reward of up to £5,000 is offered to anyone who provides information which directly leads to the arrest and conviction of any person responsible for this crime.
Anyone with information should contact DC Alan Poulton on 01474 330600.
Alternatively, you can contact Kent Crimestoppers anonymously on 0800 555111.
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