National Black Heavy-Duty Pneumatic Screen Door Closer Brand_KnockOut batteries and charger sold separately)

batteries and charger sold separately) is a best-in-class fastening solution for users who want more torque

Extra sturdy and durable

Change filter each season

removes grease

Added joint support with glucosamine and Chondroitin sulfate

National Black Heavy-Duty Pneumatic Screen Door Closer Brand_KnockOut batteries and charger sold separately)Heavy duty air controlled door closer is designed for use on out swinging wood or metal doors up to 1 3 8' thick. Door closing speed is fully adjustable. 2 hole end plug allows closing force to be regulated. Includes convenient,hold open, washer. Extended operating life as closer is permanently lubricated.