Engineered for Heavy-Duty Use: Wright Products heavy-duty pneumatic (air pressure) door closer is built for out-swinging medium-to-heavy weight storm or security doors. Measures 12-1/4" long (unextended, center hole to center hole), with a 10-1/2" tube length and 1-1/2" diameter for reliable daily performance. Adjustable Speed Control: Customize the closing speed or force with an easy-to-use thumbscrew—no tools required. Quiet, Controlled Closing: Pneumatic tube and internal lubricated spring deliver smooth, slam-free operation that helps protect your door and frame. Hold Open Convenience: Integrated hold-open washer lets you prop the door open effortlessly to your desired position. Simple DIY Installation: Compatible with most doors and includes mounting hardware for fast, hassle-free setup.