Police are hunting for thieves who struck at a building site over consecutive days in December last year.
Two trucks attended the site in North Sunshine about 9am on December 17.
A man entered the site and stole a number of items, including a generator, extension lead and a submersible water pump.
A second man waited outside the site during the incident.
Police said a second burglary was carried out at the site the following morning at about 4am.
On the second occasion, thieves covered the intercom, moved the CCTV cameras and stole various tools from the site.
Brimbank CIU Detective Senior Constable Madeline Gillard said it was a reminder for tradies to exercise caution with their assets.
“Tradespeople work hard for their tools; criminals do not,” Detective Senior Constable Gillard said.
“Opportunistic thieves target items left in clear view and in some unlocked houses, sheds and cars.”
Detective Senior Constable Gillard said tradespeople should engrave their tools to help police return them to their rightful owners.
“Marking tools with your name is great to identify tools on a worksite, but provides little opportunity to identify the owner should we recover stolen tools,” she said.
“Engraving items with V for Victoria, followed by your drivers licence number allows police to easily identify an item’s rightful owner.”
Investigators have released images of the trucks and two men who they believe may be able to assist with their inquiries.
Anyone with information is urged to contact CrimeStoppers on 1800 333 000.