A Dublin man caught with a glass breaker in a southside suburb had no explanation for why he had the item.
Paul Lillycrap (36) was found with the tool when he was stopped by gardai.
Judge Anne Watkin sentenced Lillycrap to one month in prison. The defendant, of Cedar Court, in Ballybrack, admitted before Dun Laoghaire District Court to possession of a glass breaker.
The incident took place at Shanganagh Road, in Ballybrack, on January 23, 2016.
The court heard the DPP had directed summary disposal of the matter in the District Court.
Garda Brian Hall said he was on mobile patrol when he came across Lillycrap. Gda Hall told the court he stopped the defendant and searched him under the Misuse of Drugs Act.
During the course of the search, Gda Hall said he found the glass breaker.
The garda said he asked Lillycrap why he had the glass breaker, but the defendant was unable to give him any reason for having it.
Lillycrap was arrested and taken back to Dun Laoghaire Garda Station. He was later charged.
The court heard Lillycrap had 83 previous convictions, dating back more than 15 years.
The defendant's convictions include more than 50 for theft-related matters.
He also has convictions for drugs, trespass, assault and possession of articles for use in a theft. The court heard Lillycrap is currently serving a six-month sentence, which was imposed in April.
Judge Watkin noted a glass breaker was an unusual object for an individual to have, and was told that it was similar to an item commonly seen on a train.
Defence solicitor Ronnie Lynam said that Lillycrap wished to apologise to the court for his behaviour. The court previously heard Lillycrap, a father-of-two, had suffered from various different addictions for most of his adult life.
Mr Lynam accepted his client had an extremely poor criminal record.
Judge Watkin said Lillycrap was not charged with any other offences but his possession of the glass breaker had to be viewed in the context of his history of offending behaviour.
Imposing a one-month sentence, Judge Watkin said she would make it concurrent to the sentence Lillycrap is currently serving.
The offence was contrary to the Firearms and Offensive Weapons Act.