The raging brute who used a black claw hammer to attack four strangers — including a young female cop — took a plea deal Monday.

David Baril, 32, pleaded guilty to attempted aggravated assault on a police officer and three counts of second-degree assault in exchange for 22 years in prison.

Baril admitted in Manhattan Supreme Court to bashing four strangers with a hammer in unprovoked attacks.

On May 11, 2015, the hammer-wielding hobo first struck a 20-year-old man in the back of the head near West 35th Street and Sixth Avenue.

About six hours later, Baril snuck up behind a 28-year-old woman seated on a bench in Union Square Park and whacked her on the head. A few minutes later, he bashed a 33-year-old woman with the same hammer.

The madman’s rampage ended two days later when Police Officer Lauren O’Rourke approached him in Hell’s Kitchen. He responded by pursuing her into a busy intersection and beating her with a hammer.

Her partner, Geraldo Casaigne, was only able to stop the crazed attack by shooting Baril.

He’s expected to be sentenced June 29.