Thieves have been targeting vans and cars in villages near Rugby.
Police have now launched an investigation into the spate of thefts.
The thefts, between September 4 and October 18, have mainly been overnight.
• Work tools were stolen from a Fiat works van in Daventry Road, Barby (4 September)
• Work tools were stolen from a Vivaro works van in Greenway, Braunston (5 September)
• Work tools were stolen from a Citroen works van in Ware Orchard, Barby (8 October)
• A laptop bag was stolen from a Vauxhall Corsa car in Ware Orchard, Barby (8 October)
• Number plates were stolen from a Ford Fiesta car in The Ridgeway, Barby (16 October)
• Work tools were stolen from a Volkswagen works van in Church Road, Braunston (18 October)
Sergeant Paul Valentine, of Daventry police, said: “The investigations are ongoing into these offences and we have stepped up night patrols in the area.
“Our advice to car owners is never to leave valuables on display in their vehicle and we would recommend van owners remove tools from their vehicles overnight.”
The mobile police station will be in Barby on Wednesday (30 October) between 2pm and 7pm.
Police will be on hand to offer crime prevention advice and gather information.
Anyone with information about these incidents should contact Northamptonshire Police on 101 – alternatively, information can be given to Crimestoppers on an anonymous basis by ringing 0800 555 111.