Handcuffs seem like something not allowed in a school, but it's not a gun so that could just be unspoken if at all...
Neither is half the stuff people bring to school. This is the "we couldn't give 2 stuffs anymore" type of school.
People bring dip (which is gross as forget), knifes, handcuffs in that occasion, ciggerates, Mary Jane, More types of Mary Jane, pills, dru... You get the picture right?