Defender Security SEGAL S 4772 Hinged Window Guard, 14-Inch - 22-Inch x 21-Inch, 4-Bar, Adjustable Width, EGRESS, Painted White, Pack of 1 Mounts inside the home, over face of window. Do not mount where operation of sash will be obstructed. Mount vertical bars over jamb, of casing, of jack or trimmer stud Features narrow 3-7/8 inch bar spacing to prevent small children from accidental falls through open windows Quick release feature for fast window guard removal in emergencies with distinct 3-step removal procedure to discourage toddlers Provided with tamper resistant, one-way drive fasteners to keep window guard firmly attached Meets New York City, New Jersey and Oregon Home Builders Association health and safety building codes