National Hardware Aluminum Heavy-Duty Pneumatic Screen Door Closer is a heavy-duty air-controlled door closer designed for use on outswinging wood or metal doors up to 1-3/8" thick. This durable closer features fully adjustable door closing speed to ensure smooth and reliable operation. Its 2-hole end plug allows you to regulate the closing force according to your needs. The product includes a convenient hold-open washer for added functionality. With extended operating life thanks to permanent lubrication, this closer long-lasting performance and dependability. Model Number: N100-040