The Norton 210 Adjustable Light Duty Surface Closer is an adjustable door closer for light traffic commercial openings including office and utility closet doors. It is Tri-Style, meaning it supplied with screws, a bracket and a soffit plate to allow for regular, top jamb and parallel installation.This door closer allows for adjustment of door speed from the door's full open position to down to approximately 10 degrees from the closed position. The Norton 210 door closer is suitable for use on fire doors and is supplied with a full plastic cover.