Close doors without slamming or effort! The upgraded SHIMIDO door closer, with 35.27 oz of pull force and a dual steel cable system, ensures smooth and silent closing for sliding, storm, aluminum, and glass doors. Tested for durability over 80,000 times, it withstands heavy use without losing efficiency. The improved design simplifies installation—no drilling, complicated setup, or extra tools required. Just attach it and enjoy automatic closing that extends your door’s lifespan and eliminates drafts