This Rixson Firemark No. 66 Floor Closer is a high-quality, heavy-duty item that is perfect for commercial use. It features a self-closing design with left-handed door handling and is made of durable metal material. The fasteners, hardware, and instructions are all included with this purchase, making installation a breeze. The floor closer is designed with a 3/4" offset left-hand side and is suitable for use with UNI-Check size 66. It is manufactured in the United States and does not require a battery for operation. This item is perfect for those looking for a reliable and sturdy floor closer and is sure to meet all their commercial needs.