More than £3,000 worth of stock was stolen from a builders’ merchant in Pontllanfraith.
Five Dewalt 18v compact impact driver kit boxes and 21 various sizes of lead rolls were taken in the break-in at Hughes Forrest on Newbridge Industrial Estate.
Gwent Police said the burglary happened between 1am on Monday, June 15 and 7.20am on Tuesday, June 16.
The suspects left the scene in a Peugeot van which was damaged during the break-in.
Anyone with any information can call police on 101 quoting reference 2000209941 or Crimestoppers anonymously on 0800 555 111.