Lincolnshire Police are investigating a series of thefts from vehicles across the county - including in Gainsborough.
Since April 6, officers have received multiple reports around the county that work vans have been targeted and tools taken.
These have occurred county-wide including areas such as Boston, Sleaford, Lincoln, Gainsborough, Bourne, Spalding and Grantham.
A police spokesman said: "If anyone does have information or has seen a work van being targeted, please contact us on 101 quoting incident 89 of April 6 or contact Crimestoppers on 0800 555 111.
"We would also like to issue advice on preventing vehicles from being targeted:
"Remove all tools that are essential to your day-to-day business, if this is possible
"Fit additional security deadlocks that are separate to the vans central locking system
"If your vehicle uses keyless entry, store the van keys in a good quality RFID bag when not in use
"Consider fitting a Thatcham approved Ultrasonic alarm that protects both the rear load and cabin areas of your van
"Mark your tools and register them for free at immobilise.com."