A 15-year-old boy who brought a wrench to a fistfight is facing a felony assault charge, according to court documents.

Two Oak Harbor teenagers got into a disagreement over something that was on Snapchat and agreed to meet to fight on the west side of Windjammer Park in the afternoon of June 26, according to the police report.

The two boys started wrestling and a wrench fell out of one of the boy’s pocket. The boy who brought the wrench put the other boy in a headlock for a short time, which ended the fight.

The boy who brought the wrench walked off but then returned a short time later, demanding the tool be returned.

After getting it, he swung the wrench and struck the other kid on the arm and on the back of the head, at the base of the skull, the report states.

An officer later spoke with the wrench-wielding teenager, who said he struck the other boy because he thought the boy was going to punch him, the report indicates.

The suspect was arrested on suspicion of second-degree assault.