The two Parole Board members who freed Harold (Kayo) Konigsberg from prison offered no explanation for cutting loose the stone-cold killer.

With good reason. Whatever they might have said would have been an insult to justice.

Michael Hagler and Sally Thompson could not have said Kongisberg had repented for the murder he committed as a particularly vicious mob hit man — he was not contrite in the least.

And they could not have said he was a cooperative parole applicant — he held them in contempt.

And they could not have said relatives of the man he was convicted of garrot ing were okay with the release — they never consulted his family.

And they could not have said they believe Konigsberg’s half century behind bars is sufficient — his victims are dead forever.

And they could not have said that, at the age of 86 and suffering from unspecified health issues, Konigsberg was becoming a financial burden on the prison system — penny-pinching is not cause for opening the cell door.

All the more astonishing, Hagler and Thompson have lengthy backgrounds as cops and criminal investigators. They should have known better than to end Konigsberg’s punishment.

A loan shark with especially violent collection methods and a suspect in 20 mob killings, Konigsberg in 1961 murdered Anthony (Three Fingers) Castellito at the order of Genovese capo Anthony (Tony Pro) Provenzano, who was later convicted in the killing and died in prison.

In 1998, Konisberg began appearing before parole commissioners, always glorying in studied wiseguy arrogance. Seven times, the commissioners turned him down flat. Then he showed up before Hagler and Thompson and they cut him a break, even th ough he was as unapologetic and disrespectful as ever.

In an added turn of the knife, Konigsberg now lives in a waterfront house in Florida, a few hours’ drive from the home of his victim’s daughter. Her father cannot be paroled from his fate, nor can she be paroled from her suffering. Konigsberg should have served his life without parole.