Robbers armed with a hammer and a spanner stole cash in a raid on a shop in Brixworth.
The two men walked into the Co-operative shop in Hunters’ Way, Brixworth and demanded the till, which was later found in Lessen Road.
They also got away with cigarettes.
Police are appealing for witnesses to the robbery, which happened shortly before 11pm on Monday.
The first offender is described as a white man, around 6ft 2in, of stocky build, in his late 20s or early 30s, with his face covered and wearing dark clothing.
The second was a white man, around 5ft 9in, of medium build, in his mid 20s, wearing white hooded top with three black stripes on the hood and a navy jacket.
Witnesses to this incident, or anyone with information, should call Northamptonshire Police on 101.
Alternatively, information can be given anonymously to Crimestoppers on 0800 555 111.