At around 11am on Thursday 22 August 2013, the suspect left the store on Oak Beck Road with a drill worth around £100 without paying for it.
Police would like to speak to the woman shown in the image as she could have important information which could help the investigation.
Officers are appealing for anyone who can help identify the woman to get in touch.
Alternatively you can pass information anonymously to Crimestoppers on 0800 555 111.
Please quote reference number 12130144496 when passing on information about this crime.