It was discovered during a number a searches on Thursday night.
Officers and student officers attended a number of incidents, including 3 domestic ones.
Knuckle dusters are banned from being imported, made or sold in the UK.
It is also a crime to carry such a weapon in a public place.
Devon voters go to the polls
A third of Plymouth City Council seats are up for grabs
Clyst valley park could double in size
Residents will have their say
Multiple arrests made in Exmouth
Patrols stepped up to tackle big issues
Sid Valley Radio joins East Devon broadcast bid
New digital stations planned for East Devon
Radio Exe newsreader to abseil down Exeter Cathedral
Josh Tate will descend over 100 feet on Saturday
Devolution must move on from 'meagre gruel'
More substantial fare will follow, supporters say
